4" Sand RND Poly Grate

NDS 4" Sand Round Grate. It is made of structural foam polyolefin with UV inhibitors. The open surface is 3.85 sqin and has a flow rate of 5.04 gpm. It fits 4" sewer & drain pipe & fittings, 4" corrugated pipe, & 4" triple wall pipe. It is recommended for pedestrians, bicycles, & wheel chair traffic.