material:nylon(PPCO) and TPR(PU) spec:50mm,40mm load:30kg,20kg mini order:1,000 good quality,competive price CodeWheelDiameter(D)(mm)Load(kg)Height(H)(mm)S socket Stem(φ*L)CTNSize(cm)L*W*Hpcs/CTNG.W/CTN(kg)GS5036503060.5φ8*3855*36*2020017GS4032402050φ8*3855*36*1935019 We have more than 300 different sizes for casters and wheels, used for furnitures,medical equipment, logistics department and so ...