Seamless Steel Pipe: Steel Grade: A, B, X42, X46, X52, X56, X60, X65, J55, K55, 16Mn, ST37, ST52. Seamless Steel Pipe with Beveled End, Plastic Cap and Black Paint . Outside diameter: 13.7.3-610mm (3/8-24 inch). Thickness: SCH 20 to SCH 140 (1.73-36.5mm) . Pipe's Packing: Labeled and bundled together with steel strip.