... products as 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 ... conveyor chains :2040,2050,2060,20805)leaf chains:LH series,AL series6)stainless steel roller chains7)simplex,double,triplex ... (16B-2) durable duplex roller chains &chain manufacturer B series