The NDS 18in x 18in Catch Basin 2-Opening Kit features UV-resistant 1-piece injection-molded structural polypropylene construction for strength. Use in areas where water buildup occurs. Collects excess surface water from lawn, landscape, residential driveways and garages. Suitable for light vehicular traffic when properly installed, suitable for both landscape and hardscape applications and able to withstand normal abuse in landscaping applications. 5 psi maximum working pressure, fade resistant, rust resistant, lightweight, sump area collects debris and helps prevent clogged pipes.