Type: driving wheel, loading wheel, training wheel. Material: polyurethane Wheel dia: 0~500mm Tread width: 0~200mm Axle hole dia: 0~200mm Loading capacity: 0~2000kgs Unit price: $5.00~$70.00 (exw) Export port: ningbo, shanghai. Payment term: tt, lc ect. We are manufacturer. If there are any questions please do not hesitate to contact me for the further details.