A series roller chains 1. material: alloy steel 2. color : blue, black, yellow and natural A series roller chainsSpecification: ... -1, 40A-1, 48A-1.2. Duplex: 04C-2, 06C-2, 085-2, 08A-2, 10A-2, 12A-2, 16A-2, 20A-2, 24A-2, 28A-2, 32A-2, 36A-2, 40A-2, 48A-2.3. Triplex ... , 20A-3, 24A-3, 28A-3, 32A-3, 36A-3, 40A-3, 48A-3.Material: alloy steelQuality: With superior alloy steel ...