... :40mn/45mn standard:ISO/ANSI/DIN 428H high quality motorcycle chain,suit for all kinds of motorcycles as Yamaha,suzuki1)material:40mn/45mn2 ... requirementMain products as the following1)roller chains: A series(12.7-63.5mm pitches),B series (9.525-50.8mm pitches ... -2,K-3,SA-1,SA-2,SK-A,SK-24)double pitch transmissions v& conveyor chains :2040,2042,2050,2052 ...