... :40mn standard:ISO/ANSI/DIN fast delivery 415 good quality motorcycle roller chain,1)material:40mn2)color : nature,black,blue,yellow3)advanced ... .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 ...