Heavy-duty, wear-resistant, smooth and quiet.Durable PU solid wheelchair caster replacement parts are compatible with most manual wheelchairs on the market.Excellent workmanship, noiseless, sturdy and durable, can rotate 360 degrees, high hardness, high uniformity Installation instructions: The installation screws must be tightened, and the wheel must be able to rotate but not shake. Name: Wheelchair Accessories Rear Wheel Diameter: 30 cm (12 inches) Wheel width: 4.6 cm Aperture: 1.2 cm Color: gray, black Dear buyers, be sure to check the size before you buy. Note that this wheel is only suitable for manual wheelchairs! Due to differences between different displays, the image may not reflect the actual color of the project. The size is purely manual measurement, there will be minor errors, please refer to the actual object.5. Durable PU solid wheelchair caster replacement parts are compatible with most manual wheelchairs on the market. 4. Thickened hub, shoulder width 5.5cm, pressure resistance, strong load bearing, wear resistance. 3. High-quality bearings, which is flexible to rotate, 360 rotation, save worry and effort, shaft hole 1.2cm,and has a long service life. 2. PU tires, no inflation, not afraid of puncture, strong toughness, elastic, durable. 1. Before buying, please make sure that your original wheel diameter is 30cm 12 inches, and the axle hole size is 1.2cm.