9" x 9", Sand, Square Grate, Made Of Structural Foam Polyolefin With UV Inhibitors, Open Surface Area Is 39.50 SQ IN And Has A Flow Rate of 51.75 GPM, Use With The 9" x 9" Catch Basin Series, It Is Class B Load Rated Which Is Recommended For Medium Duty Pneumatic Tire Traffic, Autos & Light Trucks At Speeds Less Than 20 MPH.
