... .material:low carbon steel 2.Bearing bar pitch:30,40,60mm 3.Cross bar pitch:50,100mm 4.manufacturer Steel Grating ... x 5 x 3mm, 32 x 5 x 3mm, 38 x 5 x 3mm, 40 x 5 x 3mm, 50 x 5 x 3mm, 50 x 7 x 4mm, 55 x 7 x 4mm, 60 x ... x 7 x 4mm, etc.5) Bearing bar pitch: 15mm, 25mm, 30mm, 33. 5mm, 37. 5mm, 40mm, 50mm, etc. and 30, 40, 60mm ...