The Unicel C-7440 R is a pool and spa water filter cartridge that is the correct compatible replacement for the following filters:
The Unicel C-7440 Comp. Pool Water Filter Cartridge has an outer diameter of 7 inches, with a length of 11 1/8 inches. This Unicel pool filter has an open top and bottom with both having diameters of 3 inches. This Unicel C-7440 filter contains 40 square feet of filter media.