... . factory direct sale motorcycle chains 4151)material: 40MN2)pitch:12.7mm3)plate thickness:1.3mm4)colors: natural,black,blue,yellow5 ... products as the following1)roller chains: A series(12.7-63.5mm pitches),B series (9.525-50.8mm pitches)2)motorcycle ... 2080,2082 and with H series5)agricultural chains:C212A series,ZGS38 combine chain series,3558T, rice harvester chains attachments6)simplex, duplex, ...