API certificated, Produced according to DIN2448, DIN2440, or equivalent EN, BSEN standard DIN Standad, EN Standard PipeSize: 1/4" to 24"Material Grade: ST35, ST52 or other carbon steel materialSurface: Black and Gal. or VarnishedEnd: Threaded with coupling and plastic cap Or Plain End DIN2448 St52 seamless steel pipe