... 3/4", 13 3/8", 16", 18 5/8", 20", 30" Grade J55, K55, N We supply all sizes and grades of ... 3/4", 13 3/8", 16", 18 5/8", 20", 30” 1.05”, 1.315”, 1.66”, 1.9", 2 3 ... ", 2 7/8", 3 1/2", 4", 4 1/2" Grade J55, K55, N80, L80-1, L80-9Cr, L80-13Cr, C90 ...