NDS 6 In. Black Structural Foam Polyolefin Square

NDS 6 In. black square structural foam polyolefin grate is a 6 In. black square grate with a diagonally converging pattern and uv inhibitors. it has an open surface of 10.40 Sq. In. and a flow rate of 13.62 gpm. it fits 3 In. or 4 In. sewer and drain pipe, 3 In. or 4 In. corrugated pipe, and 3" or 4" triple wall pipe. it can withstand loads of 1-60 psi and is recommended for pedestrian, bicycle, and wheelchair traffic. it comes with a limited lifetime warranty.