... /45mn standard:ISO/ANSI/DIN 428H high quality motorcycle chain,suit for all kinds of motorcycles as Yamaha,suzuki1)material:40mn/ ... as your requirementMain products as the following1)roller chains: A series(12.7-63.5mm pitches),B series (9. ... 520,520H,6303)short pitch conveyor roller chain attachments:A-1,A-2.K-1,K-2,K-3,SA-1 ... ,SA-2,SK-A,SK-24)double pitch transmissions v& conveyor chains : ...