... standard:ISO/ANSI/DIN color:nature,black,yellow,blue 520 high quality motorcycle chain,suit for all kinds of motorcycles 1)material:40mn/45mn2 ... .5mm pitches),B series (9.525-50.8mm pitches)2)motorcycle chains :415,415H,420,420H,428,428H,520,520H,6303 ... and with H series5)agricultural chains:C212A series,ZGS38 combine chain series,3558T, rice harvester chains attachments6)simplex, duplex, triplex ...