Roller Chains (A series) Zhejiang Shenniu Machinery Manufacture Co., Ltd. Base Info Model NO.:40, 50, 60, 80, 100, 120, 140, 160, 180, 200Usage:Transmission ChainMaterial:AlloySurface Treatment:PolishingStructure:Roller Chain Description Pre:Coil Spring Next:Soft Lid Stay Ys319-Su Soft Close Lid Stay From China Supplier