alloy: 1A99, 1A97; temper: H19; Thickness: 0.09~0.15; width: 500~1000; I. D: 76.2; Max O. D: 1450 Adopted Standard: GB/T3615; alloy: 3003, 3001; temper: H19; Thickness: 0.02~0.05; width: 500~1000; I. D: 76.2; Max O. D: 1450 Adopted Standard: GB/T3615; Contact: