Size (OD) 4 1/2", 5", 5 1/2", 6 5/8", 7", 7 5/8", 8 5/8", 9 5/8", 10 3/4", 13 3/8", 16", 18 5/8", 20", 30" Grade J55, K55, N We supply all sizes and grades of casing and tubing, both Seamless and ERW.Manufacturing methodCold Drawn or Hot-rolled Seamless, ERW, LSAW ERW, Hot-rolled and cold-rolled Seamless Size (OD)4 1/2", 5", 5 1/2", 6 5/8", 7", 7 5/8", 8 5/8", 9 5/8", 10 3/4", 13 3/8", 16", 18 5/ ...