... 30x4.5, 30x5, 32x5, 40x5, 50x5, 65x5, 75x6, 75x10---100x10mm etc; I bar: 25x5x3, 30x5x3, 32x5x3, 40x5x3 etcUS standard: 1''x3 ... 1''x1/8'', 1 1/4''x1/8'', 1 1/2''x1/8'' etc2Bearing Bar Pitch12.5, 15, 20, 23. ... -4, 15-w-4, 11-w-4, 19-w-2, 15-w-2 etc. 3Twisted Cross Bar Pitch38.1, 50, 60, 76, ... 80, 100, 101.6, 120mm, 2'' & 4'' etc 4Material GradeASTM A36, A1011, A569, Q235, S275JR, SS304, Mild ...