Product name: heavy duty castor Type: rigid castor, swivel castor, brake castor. Material: polyurethane, nylon (poluamide). Wheel dia: 0~200mm Tread width: 0~50mm Load capacity: 0~1000kgs With ball/roller bearing and bracket. Unit price: $6.00~$15.00 (exw) Export port: ningbo, shanghai. Payment term: tt, lc etc. If there are any questions please do not hesitate to contact me for the further details.