... used in lots kinds of chairs 3,Caster weel had been past BIFMA testing caster wheelItem NO: HYL-101,Color:Black2 ... ,Material: Alloy and Nylon with Brake3,Pin size:11x22mm4,Wheel Diameter:50mm5 ... ,Packing: 200 pcs / carton6,Packing size:55x33x31cm7,Specification:Meet BIFMA StandardThis chair caster performance on ...