We offer discount for large quantity. Welcome to us!4 Sets Door Casters Rollers Pulleys Cabinet Slides Cabinet Cabinet Smoothly and Mute Nylon CastersThe roller wheel is an addition to the cabinet. With this cabinet door roller, you can open the cabinet door conveniently and easily. Color: Black + White Material: Nylon + Iron Product Size: 85*45*30mm Package Contents: 4 Sets * Funiture Roller Sliding Door (1 Set = 1 Pc. Top wheel + 1 pc. Bottom Wheel)Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement error is +/- 1-3cm. About UsWe provide good product with best price, we support wholesale order/