Product Name: Cart ;Material: Rubber, Plastic Color: Black;Diameter: Inner Hole: 7-8mm,Outer:13.5cm / 5.3 inch Thickness: 2.5 cm / 1inch;Wheel Size(.): 13.5 x 2.5 cm / 5.3 inch x 1inch (D*T) Weight: 139g 2 pieces of shopping cart caster, with black plastic hollow center core and rubber exterior. Replaceable cart wheel suitable for fixing on , station hand pushcart, travelling luggage cart and children bike cart. Good replacement for the broken wheels of your shopping cart, made of rubber and plastic material, it is your Prefect choice. Package Contents: 2 x Cart Rubber Wheels Only 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.