3"Sand FLT Atrium Grate

3", Sand, Flat Top, Structural Foam Polyolefin, Atrium Grate, With UV Inhibitors, Open Surface Area Is 9.40 SQIN, Flow Rate Of 12.31 GPM, Fits 3" Sewer & Drain Pipe & Fittings, 3" Corrugated Pipe, & 3 " Triple Wall Pipe.