... A series roller chainsSpecification:1. Simplex: 03C, 04C-1, 06C-1, 085-1, 08A-1, 10A-1, 12A-1, 16A-1, 20A-1, 24A-1, 28A-1, 32A-1, 36A-1, 40A-1, 48A-1.2. Duplex ... : 04C-2, 06C-2, 085-2, 08A ... ANSI standards.Color: blue, black, yellow and natural industrial transmission chain (A series)