PS4500 Size: 9" Features: -Designed to be easily camouflaged.-Rugged high-density polyethylene shell warranted for life.-Filters using a basket and mat.-Super flow weir door for maximum surface cleaning.-Weir opening: 9"; max pump flow: 4,000 GPH.-Weir opening: 6"; max pump flow: 3,000 GPH. Includes: -Includes removable lid, filter mat, basket and silicone.