9x9 BLK SQ Grate

NDS 9"x9" Black Square Grate is made of structural foam polyolefin with UV inhibitors. It has an open surface area of 39.50 Sq.In. with 51.75 gpm. It is used with the 9"x9" catch basin series. It is rated a class B load, which is recommended for medium duty pneumatic tire traffic, autos & light trucks at speeds less than 20 mph. It comes with a limited lifetime warranty.