
It is made of rubber,metal,can withstand a great weight Not easy to be wear and tear. It is very flexible. Wheel OD: 80mm Wheel wide: 24mm Bearing ID: 6mm Axles: 40mm color:Black Package include: 2 set wheels With screw pin Gasket Note: Light 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.