... 1''x1/8'', 1 1/4''x1/8'', 1 1/2''x1/8'' etc2Bearing Bar Pitch12.5, 15, 20, 23 ... 25, 60, 80mm etcUS standard: 19-w-4, 15-w-4, 11-w-4, 19-w-2, 15-w-2 etc. 3Twisted Cross Bar Pitch38.1, ... 40,50, 60, 76, 80, 100, 101.6, 120mm, 2 ... 4001.1-2007, Characteristic:steel grating (1)high strength, (2)light structure, (3)good appearance(4)durable in use ...