Pipe M. s black line, electric resistance welded, normal dia 4 inch, W. t. 6mm, weight per meter 16. 02 KG. Test pressure 1800 psi, API-5l, grade b certified (each joint having 06 meter random length) API thread STD 5b on both end with end protecting caps, pipe anti rust coated. Qty: 2190 jnts Coupling M. s seamless, 4 inch, dimensions, weight, length & other specs conferming to API standard 5l, grade b, threads STD 5b with antirujst coating Qty: 2190 nos.