The NDS grate is a proven alternative to traditional concrete drains. UV inhibitors are used to prevent fading and cracking from the sun. Chemical-resistant, rustproof and maintenance-free, lightweight and easy to install. Helps to collect and remove excess water from driveways, patios and any other outdoor areas. Designed for maximum durability to handle light foot traffic.11.75" (L) x 11.75" (W)Color: BlackMade from High-density polyethylene (HDPE)UV inhibitors are used to prevent fading and cracking from the sunChemical-resistant, rustproof and maintenance-freeHelps to collect and remove excess water from driveways, patios and any other outdoor areasDesigned for maximum durability to handle light foot trafficLightweight and easy to installThe open surface area is 50.76 SqIn with 66.50 GPMUse with the 12" x 12" catch basin seriesRated a class B load, which is recommended for medium duty pneumatic tire traffic, autos & light trucks at speeds less than 20 MPH.