12x12 GRN SQ Grate

NDS 12"x12" Green Square Grate. It is made of structural foam polyolefin with UV inhibitors. The open surface area is 50.76 sqin with 66.50 gpm. It is used with the 12"x12" 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.