Product Name: Cart Rubber Wheel;Material: Rubber, PlasticColor: Black;Diameter: Inner Hole: 7-8mm,Outer:13.5cm / 5.3 inchThickness: 2.5 cm / 1inch;Wheel Size(Approx.): 13.5 x 2.5 cm / 5.3 inch x 1inch (D*T)Weight: 139g / setProduct Description20 pieces of shopping cart caster, with black plastic hollow center core and rubber exterior.Replaceable cart wheel suitable for fixing on shopping trolley, station hand pushcart, travelling luggage cart and children bike cart.Good replacement for the broken wheels of your shopping cart, made of durable rubber and plastic material, it is your Prefect choice.Package Contents:20 x Cart Rubber WheelsOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.