... , 30x3, 30x4, 30x5, 32x3, 32x5, 40x5, 50…75x8mm, etc.2Bearing bar pitch25, 30, 30.16, 32.5, 34.3, 40, 50 ... , 60, 62, 65mm, etc.3Cross bar5x5, 6x6, 8x8mm (twisted bar or round bar)4Cross bar pitch40, 50, 60, 65, 76, 100, 101.6 ... and shapes.Surface Treatment:Untreatment: blackTreatment: hot dip galvanied Galvanized floor steel grating,flooring grating,trench grating,stair tread