... 1) material:40MN 2) pitch:12.7mm 3) plate thickness:1.5mm 4) colors: natural,blue,black,yellow Motorcycle chains 4201)material ... -63.5mm pitches),B series (9.525-50.8mm pitches)2)motorcycle chains :415,415H,420,420H,428,428H,520,520H,6303 ... roller chain attachments:A-1,A-2.K-1,K-2,K-3,SA-1,SA-2,SK-A,SK-24)double pitch ...