1) Product:Seamless steel pipe 2) High quality (ISO 9001, API 5L ) 3) Size: 6mm*1mm(OD*THK) to 219mm*25mm ... carbon steel tubesMain material:Gr.A, Gr.B, X42, X46, X52, J55, N80, C90, T95, P110, SAE1010, SAE1025, SAE1035, ST37, ST44, ... ST52, ect. Standard:A519, A53, A106, A213; API5L; JISG3452, JISG3454, JISG3441, JISG3444, JISG3461, JISG3462; DIN17175, DIN1629; BS3059Available Size ...