motorcycle sproket type:420,425,428,520,530 material:C45#;stainless ... products as the following1)roller chains: A series(12.7-63.5mm pitches),B series (9.525-50.8mm pitches)2 ... 520,520H,6303)short pitch conveyor roller chain attachments:A-1,A-2.K-1,K-2,K-3,SA- ... ,2082 and with H series5)agricultural chains:C212A series,ZGS38 combine chain series,3558T, rice harvester chains attachments6)simplex, duplex, ...