... : alloy steel 2. color : blue, black, yellow and natural A series roller chainsSpecification:1. Simplex: 03C, 04C-1, 06C-1, 085 ... -2, 48A-2.3. Triplex:04C-3, 06C-3, 08A-3, 10A-3, 12A-3, 16A-3, 20A-3, 24A-3, 28A-3, 32A-3, 36A-3, 40A-3, 48A-3.Material: alloy steelQuality ... .Color: blue, black, yellow and natural industrial transmission chain (A series)