The Unicel C-2304 R is a pool and spa water filter cartridge that is the correct compatible replacement for the following filters:
The Unicel C-2304 Comp. Pool & Spa Filter Cartridge has an outer diameter of 2 3/4 inches, with a length of 6 inches. This Unicel pool filter has a closed top, and an open bottom with a diameter of 1 1/4 inches and having SAE (Society of Automotive Engineers) threads. This Unicel C-2304 filter contains 5 square feet of filter media.