standard or non standard sprockets,made according to ISO, DIN,ANSI,JIS,BS standard C45 steel We professionally export different kinds of transmission components, such as standard sprockets, taper lock sprockets, special sprockets,motorcycle sprocket ,chain couplings, shafts, gears, box gears,roller chain, agriculture chain,leaf chain,conveyor chain,oliver chain,special chain,pulleys, taper bushes ...