Less lid. Made with high density polyethylene resin. Lightweight and flexible. For residential and commercial construction. Can be used for interior and exterior foundation drains, downspout run-off drains, low-spot drainage plus driveway and sidewalk underdrainage. Heavy-duty fittings. Pre-formed drain inlet collars accept 3 lines of corrugated plastic tubing from basement interior, while a molded side panel is designed to accept corrugated tubing line, from the basements exterior perimeter drainage. 18″ diameter. 24″ liner.