5016 chain coupling 1.Material:steel 2.OEM service offered 3.Export North American/European 5016 chain couplingchain coupling, coupling ... coupling,sprocket (35B 18T)KANA standard sprocket,plate wheel, chain sprocket, taper bore sprocket, standard sprocket, idler sprocket, stainless steel ... bore sprocket,standard and non-standard sprockets etc.Material: C45, A3.... according to ISO, DIN,ANSI,JIS,BS, ...