The Unicel C-4999 R is a pool and spa water filter cartridge that is the correct compatible replacement for the following filters:
The Unicel C-4999 Comp. Pool Water Filter Cartridge has an outer diameter of 4 15/16 inches, with a length of 26 11/16 inches. This Unicel pool filter has an open top and bottom with both having diameters of 2 1/8 inches. This Unicel C-4999 filter contains 100 square feet of filter media.