... 61cmMain products as the following ANSI durable A series 60 simplex transimission chains(12A-1R)1)roller ... series products(19.05-44.45mm pitches)2)motorcycle chains :428,428H,530,530H,630,630H3)short pitch conveyor roller chain ... chains :2040,2050,2060,20805)leaf chains:LH series,AL series6)stainless steel roller chains7)simplex,double ... . : durable 60 (12A-1R) A series simplex transimission chain