... the following1)roller chains: A series(12.7-63.5mm pitches),B series (9.525-50.8mm ... pitches)and their heavy series products(19.05-44.45mm pitches)2)motorcycle chains :428,428H,530 ... 2,SA-1,SA-2,SK-A,SK-24)double pitch transmissions v& conveyor chains :2040,2050,2060,20805)leaf chains:LH series ... receipt of your detailed requirements. (16B-2) durable duplex roller chains &chain manufacturer B series