FIBERGRATE 878950 Grating Molded Premium Polyester Surface Grit Top 1 1/2 In Depth 4 Ft Width 4 Ft Span Square Mesh Mesh Size 1 1/2 x 1 1/2 In Green Bearing Bar Height 1 1/2 In Bearing Bar Width 0.25 In Bearing Bar Spacing Center-to-Center 1 1/2 In Max. Temp. 150 F