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MW 14.9x10 / N38 - cylindrical magnet

cylindrical magnet

Catalog no 010023

GTIN/EAN: 5906301810223

5.00

Diameter Ø

14.9 mm [±0,1 mm]

Height

10 mm [±0,1 mm]

Weight

13.08 g

Magnetization Direction

→ diametrical

Load capacity

7.60 kg / 74.57 N

Magnetic Induction

496.78 mT / 4968 Gs

Coating

[NiCuNi] Nickel

technical specifications »

8.24 ZŁ with VAT / pcs + price for transport

6.70 ZŁ net + 23% VAT / pcs

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Lifting power as well as structure of a magnet can be calculated on our power calculator.

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Detailed specification - MW 14.9x10 / N38 - cylindrical magnet

Specification / characteristics - MW 14.9x10 / N38 - cylindrical magnet

properties
properties values
Cat. no. 010023
GTIN/EAN 5906301810223
Production/Distribution Dhit sp. z o.o.
ul. Zielona 14 05-850 Ożarów Mazowiecki PL
Country of origin Poland / China / Germany
Customs code 85059029
Diameter Ø 14.9 mm [±0,1 mm]
Height 10 mm [±0,1 mm]
Weight 13.08 g
Magnetization Direction → diametrical
Load capacity ~ ? 7.60 kg / 74.57 N
Magnetic Induction ~ ? 496.78 mT / 4968 Gs
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±0.1 mm

Magnetic properties of material N38

Specification / characteristics MW 14.9x10 / N38 - cylindrical magnet
properties values units
remenance Br [min. - max.] ? 12.2-12.6 kGs
remenance Br [min. - max.] ? 1220-1260 mT
coercivity bHc ? 10.8-11.5 kOe
coercivity bHc ? 860-915 kA/m
actual internal force iHc ≥ 12 kOe
actual internal force iHc ≥ 955 kA/m
energy density [min. - max.] ? 36-38 BH max MGOe
energy density [min. - max.] ? 287-303 BH max KJ/m
max. temperature ? ≤ 80 °C

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C
properties values units
Vickers hardness ≥550 Hv
Density ≥7.4 g/cm3
Curie Temperature TC 312 - 380 °C
Curie Temperature TF 593 - 716 °F
Specific resistance 150 μΩ⋅cm
Bending strength 250 MPa
Compressive strength 1000~1100 MPa
Thermal expansion parallel (∥) to orientation (M) (3-4) x 10-6 °C-1
Thermal expansion perpendicular (⊥) to orientation (M) -(1-3) x 10-6 °C-1
Young's modulus 1.7 x 104 kg/mm²

Engineering modeling of the magnet - data

These values constitute the result of a physical analysis. Values were calculated on algorithms for the material Nd2Fe14B. Actual performance might slightly differ from theoretical values. Please consider these calculations as a preliminary roadmap during assembly planning.

Table 1: Static pull force (pull vs gap) - power drop
MW 14.9x10 / N38

Distance (mm) Induction (Gauss) / mT Pull Force (kg/lbs/g/N) Risk Status
0 mm 4965 Gs
496.5 mT
 7.60 kg / 16.76 pounds
7600.0 g / 74.6 N
 medium risk
1 mm 4309 Gs
430.9 mT
 5.72 kg / 12.62 pounds
5722.6 g / 56.1 N
 medium risk
2 mm 3660 Gs
366.0 mT
 4.13 kg / 9.10 pounds
4129.1 g / 40.5 N
 medium risk
3 mm 3063 Gs
306.3 mT
 2.89 kg / 6.38 pounds
2892.7 g / 28.4 N
 medium risk
5 mm 2098 Gs
209.8 mT
 1.36 kg / 2.99 pounds
1356.5 g / 13.3 N
 safe
10 mm 838 Gs
83.8 mT
 0.22 kg / 0.48 pounds
216.5 g / 2.1 N
 safe
15 mm 389 Gs
38.9 mT
 0.05 kg / 0.10 pounds
46.6 g / 0.5 N
 safe
20 mm 207 Gs
20.7 mT
 0.01 kg / 0.03 pounds
13.2 g / 0.1 N
 safe
30 mm 78 Gs
7.8 mT
 0.00 kg / 0.00 pounds
1.9 g / 0.0 N
 safe
50 mm 20 Gs
2.0 mT
 0.00 kg / 0.00 pounds
0.1 g / 0.0 N
 safe
Grip strength weakens sharply per each millimeter of gap. Remember that even a microscopic distance (e.g., contamination, varnish, rust) strongly weakens the grip. Magnets work strongest in perfect adhesion; air break weakens the power. See how flashily the load capacity plummet, when the product does not touch flatly to the metal substrate. When calculating the assembly, discard redundant distances.

Table 2: Slippage force (vertical surface)
MW 14.9x10 / N38

Distance (mm) Friction coefficient Pull Force (kg/lbs/g/N)
0 mm Stal (~0.2) 1.52 kg / 3.35 pounds
1520.0 g / 14.9 N
1 mm Stal (~0.2) 1.14 kg / 2.52 pounds
1144.0 g / 11.2 N
2 mm Stal (~0.2) 0.83 kg / 1.82 pounds
826.0 g / 8.1 N
3 mm Stal (~0.2) 0.58 kg / 1.27 pounds
578.0 g / 5.7 N
5 mm Stal (~0.2) 0.27 kg / 0.60 pounds
272.0 g / 2.7 N
10 mm Stal (~0.2) 0.04 kg / 0.10 pounds
44.0 g / 0.4 N
15 mm Stal (~0.2) 0.01 kg / 0.02 pounds
10.0 g / 0.1 N
20 mm Stal (~0.2) 0.00 kg / 0.00 pounds
2.0 g / 0.0 N
30 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
50 mm Stal (~0.2) 0.00 kg / 0.00 pounds
0.0 g / 0.0 N
The following data indicates the theoretical shear load necessary to initiate the slippage of the magnet down along a upright steel wall (assuming typical friction coefficient). The holding force is a function of the gap size between the magnet and the metal.

Table 3: Wall mounting (shearing) - behavior on slippery surfaces
MW 14.9x10 / N38

Surface type Friction coefficient / % Mocy Max load (kg/lbs/g/N)
Raw steel
µ = 0.3 30% Nominalnej Siły
2.28 kg / 5.03 pounds
2280.0 g / 22.4 N
Painted steel (standard)
µ = 0.2 20% Nominalnej Siły
1.52 kg / 3.35 pounds
1520.0 g / 14.9 N
Oily/slippery steel
µ = 0.1 10% Nominalnej Siły
0.76 kg / 1.68 pounds
760.0 g / 7.5 N
Magnet with anti-slip rubber
µ = 0.5 50% Nominalnej Siły
3.80 kg / 8.38 pounds
3800.0 g / 37.3 N
When hanging a holder on a vertical plane (e.g., a fridge), it you can count on just approx. 1/5 of its nominal power. Gravity as well as a weak degree of grip cause that holders move down easier than they pull off. Want to create a hanger? Note that the sliding force is significantly lower than the maximum static pull force. On a smooth steel, the magnet will slide down under a significantly smaller weight. Using a rubber pad can effectively increase the grip.

Table 4: Steel thickness (substrate influence) - sheet metal selection
MW 14.9x10 / N38

Steel thickness (mm) % power Real pull force (kg/lbs/g/N)
0.5 mm
10%
 0.76 kg / 1.68 pounds
760.0 g / 7.5 N
1 mm
25%
 1.90 kg / 4.19 pounds
1900.0 g / 18.6 N
2 mm
50%
 3.80 kg / 8.38 pounds
3800.0 g / 37.3 N
3 mm
75%
 5.70 kg / 12.57 pounds
5700.0 g / 55.9 N
5 mm
100%
 7.60 kg / 16.76 pounds
7600.0 g / 74.6 N
10 mm
100%
 7.60 kg / 16.76 pounds
7600.0 g / 74.6 N
11 mm
100%
 7.60 kg / 16.76 pounds
7600.0 g / 74.6 N
12 mm
100%
 7.60 kg / 16.76 pounds
7600.0 g / 74.6 N
A thin sheet is unable to conduct the full magnetic flux, which squanders power of the magnet. Should you attach a powerful product to a thin surface, the field will pass right through and the pull force will drop sharply. To squeeze the maximum of this neodymium's potential, you require a sufficiently solid element of steel. The saturation phenomenon means that on sheet metal structures (e.g., appliance housings), the product holds weaker. We advise picking the steel thickness from these parameters.

Table 5: Working in heat (stability) - thermal limit
MW 14.9x10 / N38

Ambient temp. (°C) Power loss Remaining pull (kg/lbs/g/N) Status
20 °C 0.0% 7.60 kg / 16.76 pounds
7600.0 g / 74.6 N
 OK
40 °C -2.2% 7.43 kg / 16.39 pounds
7432.8 g / 72.9 N
 OK
60 °C -4.4% 7.27 kg / 16.02 pounds
7265.6 g / 71.3 N
 OK
80 °C -6.6% 7.10 kg / 15.65 pounds
7098.4 g / 69.6 N
100 °C -28.8% 5.41 kg / 11.93 pounds
5411.2 g / 53.1 N
Classic neodymiums change their properties parameters after exceeding the maximum temperature. Protect against heat – heat can irreversibly damage this magnet. As the temperature rises, the neodymium's force briefly lowers. Do not use this magnet near heat sources higher than its operating temperature limit. Ignoring the limit will lead to permanent loss of magnetic properties.
*Important note: Heat tolerance depends not only on the material grade, and the Permeance Coefficient Pc. Low-profile magnets (pancake types) risk losing magnetic properties under lower heat stress than taller cylinders. Red status in the table indicates a risk of irreversible loss for this specific geometry.

Table 6: Magnet-Magnet interaction (attraction) - field range
MW 14.9x10 / N38

Gap (mm) Attraction (kg/lbs) (N-S) Lateral Force (kg/lbs/g/N) Repulsion (kg/lbs) (N-N)
0 mm 26.50 kg / 58.43 pounds
5 802 Gs
3.98 kg / 8.76 pounds
3975 g / 39.0 N
 N/A
1 mm 23.16 kg / 51.05 pounds
9 283 Gs
3.47 kg / 7.66 pounds
3474 g / 34.1 N
 20.84 kg / 45.95 pounds
~0 Gs
2 mm 19.96 kg / 44.00 pounds
8 617 Gs
2.99 kg / 6.60 pounds
2993 g / 29.4 N
 17.96 kg / 39.60 pounds
~0 Gs
3 mm 17.03 kg / 37.54 pounds
7 959 Gs
2.55 kg / 5.63 pounds
2554 g / 25.1 N
 15.32 kg / 33.78 pounds
~0 Gs
5 mm 12.09 kg / 26.65 pounds
6 707 Gs
1.81 kg / 4.00 pounds
1813 g / 17.8 N
 10.88 kg / 23.99 pounds
~0 Gs
10 mm 4.73 kg / 10.43 pounds
4 196 Gs
0.71 kg / 1.56 pounds
710 g / 7.0 N
 4.26 kg / 9.39 pounds
~0 Gs
20 mm 0.76 kg / 1.66 pounds
1 676 Gs
0.11 kg / 0.25 pounds
113 g / 1.1 N
 0.68 kg / 1.50 pounds
~0 Gs
50 mm 0.02 kg / 0.04 pounds
245 Gs
0.00 kg / 0.01 pounds
2 g / 0.0 N
 0.01 kg / 0.03 pounds
~0 Gs
60 mm 0.01 kg / 0.01 pounds
156 Gs
0.00 kg / 0.00 pounds
1 g / 0.0 N
 0.00 kg / 0.00 pounds
~0 Gs
70 mm 0.00 kg / 0.01 pounds
105 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
 0.00 kg / 0.00 pounds
~0 Gs
80 mm 0.00 kg / 0.00 pounds
74 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
 0.00 kg / 0.00 pounds
~0 Gs
90 mm 0.00 kg / 0.00 pounds
54 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
 0.00 kg / 0.00 pounds
~0 Gs
100 mm 0.00 kg / 0.00 pounds
41 Gs
0.00 kg / 0.00 pounds
0 g / 0.0 N
 0.00 kg / 0.00 pounds
~0 Gs
Two strong neodymiums interact from a much further distance than a magnet and sheet setup. The connection of two magnets creates a more powerful interaction and a further horizon of action. Planning to create a solid fastener? Use a pair of magnets instead of a neodymium and a striker plate. Exercise caution that when bringing together two magnets, the pinch force is extreme. The repulsion force is marginally weaker than the connection force, but still significant.
*Flux density for N-N configuration drops to ~0 Gs at the midpoint between the magnets (caused by magnetic field nullification).
Attention: Figures demonstrate friction force of dual matching neodymium magnets (friction coefficient ~0.15 for Ni-Ni layer).

Table 7: Safety (HSE) (implants) - precautionary measures
MW 14.9x10 / N38

Object / Device Limit (Gauss) / mT Safe distance
Pacemaker 5 Gs (0.5 mT) 8.5 cm
Hearing aid 10 Gs (1.0 mT) 6.5 cm
Timepiece 20 Gs (2.0 mT) 5.5 cm
Mobile device 40 Gs (4.0 mT) 4.0 cm
Remote 50 Gs (5.0 mT) 4.0 cm
Payment card 400 Gs (40.0 mT) 1.5 cm
HDD hard drive 600 Gs (60.0 mT) 1.5 cm
A strong magnetic field is a large risk to IT equipment as well as pacemakers. These NdFeB products generate a field that prevents correct functioning of sensitive medical devices. Notice: the invisible magnetic field penetrates the body and plastic. Special caution must be exercised by people with cochlear implants and insulin pumps. Influence will be felt by: automatic timepieces, remotes, membranes, and displays. Do not place the magnet near cards, HDD media, or sensitive navigation tools.

Table 8: Collisions (kinetic energy) - collision effects
MW 14.9x10 / N38

Start from (mm) Speed (km/h) Energy (J) Predicted outcome
10 mm 24.74 km/h
(6.87 m/s)
 0.31 J
30 mm 42.11 km/h
(11.70 m/s)
 0.89 J
50 mm 54.36 km/h
(15.10 m/s)
 1.49 J
100 mm 76.87 km/h
(21.35 m/s)
 2.98 J
NdFeB products are prone to chipping – a strong collision with metal can result in shattering. Control the attraction moment – a magnet released freely becomes dangerous. Kinetic force can destroy the magnet or painful pinches to skin. Be sure to control the product during mounting so it doesn't hit with great force against the metal. A contact at a velocity of dozens of km/h almost guarantees destruction of the neodymium. Use safety goggles when handling with large magnets.

Table 9: Anti-corrosion coating durability
MW 14.9x10 / N38

Technical parameter Value / Description
Coating type [NiCuNi] Nickel
Layer structure Nickel - Copper - Nickel
Layer thickness 10-20 µm
Salt spray test (SST) ? 24 h
Recommended environment Indoors only (dry)
The SST (salt spray test) is an industry standard for determining coating lifespan in harsh conditions. The silver nickel coating also serves an aesthetic function but is not fully waterproof.

Table 10: Electrical data (Flux)
MW 14.9x10 / N38

Parameter Value SI Unit / Description
Magnetic Flux 8 732 Mx 87.3 µWb
Pc Coefficient 0.71 High (Stable)
Flux value passing through the magnet pole. Essential parameter for generator designers and motors. The Pc coefficient defines the working geometry.

Table 11: Hydrostatics and buoyancy
MW 14.9x10 / N38

Environment Effective steel pull Effect
Air (land) 7.60 kg Standard
Water (riverbed) 8.70 kg
(+1.10 kg buoyancy gain)
+14.5%
Rust risk: This magnet has a standard nickel coating. After use in water, it must be dried and maintained immediately, otherwise it will rust!
Contrary to myths, water does not block the magnetic field. Note: for permanent underwater work, we recommend magnets with an anti-corrosive (epoxy) coating.
1. Wall mount (shear)

*Warning: On a vertical surface, the magnet holds only approx. 20-30% of its max power.

2. Efficiency vs thickness

*Thin metal sheet (e.g. 0.5mm PC case) significantly reduces the holding force.

3. Temperature resistance

*For standard magnets, the max working temp is 80°C.

4. Demagnetization curve and operating point (B-H)

chart generated for the permeance coefficient Pc (Permeance Coefficient) = 0.71

This simulation demonstrates the magnetic stability of the selected magnet under specific geometric conditions. The solid red line represents the demagnetization curve (material potential), while the dashed blue line is the load line based on the magnet's geometry. The Pc (Permeance Coefficient), also known as the load line slope, is a dimensionless value that describes the relationship between the magnet's shape and its magnetic stability. The intersection of these two lines (the black dot) is the operating point — it determines the actual magnetic flux density generated by the magnet in this specific configuration. A higher Pc value means the magnet is more 'slender' (tall relative to its area), resulting in a higher operating point and better resistance to irreversible demagnetization caused by external fields or temperature. A value of 0.42 is relatively low (typical for flat magnets), meaning the operating point is closer to the 'knee' of the curve — caution is advised when operating at temperatures near the maximum limit to avoid strength loss.

Technical and environmental data
Elemental analysis
iron (Fe) 64% – 68%
neodymium (Nd) 29% – 32%
boron (B) 1.1% – 1.2%
dysprosium (Dy) 0.5% – 2.0%
coating (Ni-Cu-Ni) < 0.05%
Environmental data
recyclability (EoL) 100%
recycled raw materials ~10% (pre-cons)
carbon footprint low / zredukowany
waste code (EWC) 16 02 16
Safety card (GPSR)
responsible entity
Dhit sp. z o.o.
ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki
tel: +48 22 499 98 98 | e-mail: bok@dhit.pl
batch number/type
id: 010023-2026
Magnet Unit Converter
Pulling force
Field Strength
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The presented product is a very strong cylinder magnet, produced from durable NdFeB material, which, at dimensions of Ø14.9x10 mm, guarantees maximum efficiency. This specific item boasts high dimensional repeatability and professional build quality, making it an ideal solution for professional engineers and designers. As a magnetic rod with significant force (approx. 7.60 kg), this product is in stock from our European logistics center, ensuring rapid order fulfillment. Furthermore, its Ni-Cu-Ni coating effectively protects it against corrosion in typical operating conditions, guaranteeing an aesthetic appearance and durability for years.
This model is created for building generators, advanced Hall effect sensors, and efficient magnetic separators, where maximum induction on a small surface counts. Thanks to the high power of 74.57 N with a weight of only 13.08 g, this rod is indispensable in electronics and wherever low weight is crucial.
Since our magnets have a tolerance of ±0.1mm, the best method is to glue them into holes with a slightly larger diameter (e.g., 14.9.1 mm) using two-component epoxy glues. To ensure long-term durability in automation, specialized industrial adhesives are used, which are safe for nickel and fill the gap, guaranteeing durability of the connection.
Magnets NdFeB grade N38 are suitable for the majority of applications in automation and machine building, where excessive miniaturization with maximum force is not required. If you need even stronger magnets in the same volume (Ø14.9x10), contact us regarding higher grades (e.g., N50, N52), however, N38 is the standard available off-the-shelf in our warehouse.
This model is characterized by dimensions Ø14.9x10 mm, which, at a weight of 13.08 g, makes it an element with high magnetic energy density. The value of 74.57 N means that the magnet is capable of holding a weight many times exceeding its own mass of 13.08 g. The product has a [NiCuNi] coating, which secures it against external factors, giving it an aesthetic, silvery shine.
Standardly, the magnetic axis runs through the center of the cylinder, causing the greatest attraction force to occur on the bases with a diameter of 14.9 mm. Thanks to this, the magnet can be easily glued into a hole and achieve a strong field on the front surface. On request, we can also produce versions magnetized diametrically if your project requires it.

Strengths and weaknesses of rare earth magnets.

Advantages

In addition to their magnetic capacity, neodymium magnets provide the following advantages:
  • Their magnetic field remains stable, and after approximately ten years it drops only by ~1% (according to research),
  • They retain their magnetic properties even under close interference source,
  • The use of an refined coating of noble metals (nickel, gold, silver) causes the element to look better,
  • They show high magnetic induction at the operating surface, making them more effective,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
  • Possibility of individual creating as well as adjusting to specific applications,
  • Fundamental importance in innovative solutions – they are used in HDD drives, electric drive systems, medical equipment, and other advanced devices.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Weaknesses

Problematic aspects of neodymium magnets: tips and applications.
  • Brittleness is one of their disadvantages. Upon intense impact they can fracture. We advise keeping them in a special holder, which not only protects them against impacts but also raises their durability
  • We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
  • Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material immune to moisture, in case of application outdoors
  • Limited possibility of creating nuts in the magnet and complex forms - preferred is casing - magnet mounting.
  • Health risk related to microscopic parts of magnets pose a threat, when accidentally swallowed, which becomes key in the context of child health protection. Additionally, small components of these devices can complicate diagnosis medical in case of swallowing.
  • With mass production the cost of neodymium magnets is a challenge,

Pull force analysis

Detachment force of the magnet in optimal conditions – what contributes to it?

The specified lifting capacity concerns the maximum value, obtained under laboratory conditions, namely:
  • on a plate made of structural steel, optimally conducting the magnetic flux
  • whose thickness reaches at least 10 mm
  • characterized by even structure
  • under conditions of gap-free contact (metal-to-metal)
  • for force applied at a right angle (in the magnet axis)
  • in temp. approx. 20°C

Practical lifting capacity: influencing factors

It is worth knowing that the application force may be lower depending on elements below, in order of importance:
  • Space between magnet and steel – every millimeter of distance (caused e.g. by varnish or dirt) diminishes the pulling force, often by half at just 0.5 mm.
  • Load vector – maximum parameter is obtained only during pulling at a 90° angle. The force required to slide of the magnet along the plate is usually many times smaller (approx. 1/5 of the lifting capacity).
  • Plate thickness – insufficiently thick steel does not close the flux, causing part of the power to be escaped to the other side.
  • Chemical composition of the base – mild steel attracts best. Higher carbon content reduce magnetic properties and holding force.
  • Smoothness – ideal contact is possible only on polished steel. Rough texture create air cushions, weakening the magnet.
  • Operating temperature – neodymium magnets have a sensitivity to temperature. When it is hot they are weaker, and in frost gain strength (up to a certain limit).

Lifting capacity was assessed using a steel plate with a smooth surface of optimal thickness (min. 20 mm), under vertically applied force, however under parallel forces the lifting capacity is smaller. Additionally, even a small distance between the magnet’s surface and the plate reduces the load capacity.

Safe handling of NdFeB magnets
Bone fractures

Danger of trauma: The attraction force is so immense that it can cause hematomas, crushing, and even bone fractures. Protective gloves are recommended.

Heat warning

Control the heat. Exposing the magnet above 80 degrees Celsius will permanently weaken its magnetic structure and strength.

Handling rules

Handle with care. Neodymium magnets act from a distance and snap with huge force, often faster than you can react.

Health Danger

Life threat: Strong magnets can turn off heart devices and defibrillators. Do not approach if you have electronic implants.

Fragile material

Beware of splinters. Magnets can explode upon violent connection, ejecting sharp fragments into the air. We recommend safety glasses.

Danger to the youngest

Product intended for adults. Small elements pose a choking risk, leading to serious injuries. Store away from children and animals.

Precision electronics

A strong magnetic field negatively affects the functioning of magnetometers in smartphones and navigation systems. Maintain magnets close to a smartphone to prevent damaging the sensors.

Mechanical processing

Powder produced during machining of magnets is combustible. Avoid drilling into magnets without proper cooling and knowledge.

Sensitization to coating

Medical facts indicate that the nickel plating (the usual finish) is a common allergen. If you have an allergy, refrain from touching magnets with bare hands and select versions in plastic housing.

Electronic devices

Equipment safety: Strong magnets can ruin payment cards and delicate electronics (pacemakers, hearing aids, timepieces).

Important! Want to know more? Read our article: Are neodymium magnets dangerous?