... Grating Plain Steel Grating Serrated Steel Grating Stair Tread Exported to Brazil,US,UAE,UK Steel Grating 1) Material: Mild Steel (Low ... , 50/75 x 7 x 43) Bearing Bar Pitch (center to center):Common Size is 30mm,40mm,60mm, Also can make ... cleaning,easy maintenance5>Good ventilation,day-lighting,heat-dispersing,resistant to sliding and explosion.6>Easy installation and disassembly8)ApplicationThey are ...