... /45mn standard:ISO/ANSI/DIN color:nature,black,yellow,blue 520 high quality motorcycle chain,suit for all kinds of motorcycles 1)material ... : A series(12.7-63.5mm pitches),B series (9.525-50.8mm pitches)2)motorcycle chains :415,415H,420,420H ... ,428,428H,520,520H,6303)short pitch conveyor roller chain attachments:A-1 ...