The Unicel C-7455 R is a pool and spa water filter cartridge that is the correct compatible replacement for the following filters:
The Unicel C-7455 Comp. Pool Filter - Hayward CX-550 has an outer diameter of 7 inches, with a length of 19 5/8 inches. This Unicel pool filter has an open top and bottom with both having diameters of 3 inches. This Unicel C-7455 filter contains 55 square feet of filter media.