12x12 BLK SQ Grate

NDS 12"x12" Black Square Grate is made of structural foam polyolefin with UV inhibitors. It has an open surface area of 50.76 Sq.In. with 66.50 gpm. It is used with the 12"x12" catch basin series and 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.