... 2. color : blue, black, yellow and natural A series roller chainsSpecification:1. Simplex: 03C, 04C-1, 06C-1, 085- ... -1, 10A-1, 12A-1, 16A-1, 20A-1, 24A-1, 28A-1, 32A-1, 36A-1, 40A-1, 48A ... -2, 10A-2, 12A-2, 16A-2, 20A-2, 24A-2, 28A-2, 32A-2, 36A-2, 40A-2, ... -3, 10A-3, 12A-3, 16A-3, 20A-3, 24A-3, 28A-3, 32A-3, 36A-3, 40A-3, ... .Color: blue, black, yellow and natural industrial transmission chain (A series)