... , 12A-1, 16A-1, 20A-1, 24A-1, 28A-1, 32A-1, 36A-1, 40A-1, 48A-1.2. Duplex: 04C ... , 12A-2, 16A-2, 20A-2, 24A-2, 28A-2, 32A-2, 36A-2, 40A-2, 48A-2.3. Triplex:04C ... , 12A-3, 16A-3, 20A-3, 24A-3, 28A-3, 32A-3, 36A-3, 40A-3, 48A-3.Material: alloy steelQuality ... supplying meet ANSI standards.Color: blue, black, yellow and natural industrial transmission chain (A series)