... be widely used in lots kinds of chairs 3,chair castor had been past BIFMA testing chair castorItem NO: HYL-081 ... ,Color:Black or Gray2,Material: PU3,Pin size:11x22mm4,Wheel Diameter:60mm5,Packing: 200 pcs / carton6,Packing size:55x33x31cm7,Specification ... for all types of office furniture specifically office chairs. chair castor