... 1''x3/16'', 1 1/4''x3/16'', 1 1/2''x3/16'', 1''x1/4'', 1 1/4''x1/4 ... '', 1 1/2''x1/4'', 1''x1/8'', 1 1/4''x1/8 ... '', 1 1/2''x1/8'' etc 2Bearing Bar Pitch12.5, 15, 20, 23.85, 25, 30, ... 80mm etcUS standard: 19-w-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'' ...