NDS 11 4″ Black Round Grate

4″, Black, Round Structural Foam Polyolefin Grate With UV Inhibitors, Open Surface Is 3.85 SQIN & It’s 5.04 GPM, Fits 4″ Sewer & Drain Pipe & Fittings, 3″ Corrugated Pipe, & 4″ Triple Wall Pipe, Recommended For Pedestrians, Bicycles, & Wheel Chair Traffic.