... steel pipe, ASTM,JIS, DIN,API 5L STEEL PIPE 1. MATERIAL: CARBON STEEL,STAINLESS STEEL,ALLOY STEEL 2. SIZE: 1/4"--24 provide steel pipe, ASTM,JIS, DIN,API 5L STEEL ... PIPE1. MATERIAL: CARBON STEEL,STAINLESS STEEL ... 9001:2000 strictly. steel pipe, ASTM,JIS, DIN,API 5L