The Unicel C-2601 R is a pool and spa water filter cartridge that is the correct compatible replacement for the following filters:
The Unicel C-2601 Comp. Spa Replacement Filter has an outer diameter of 2 7/8 inches, with a length of 14 1/2 inches. This Unicel pool filter has an open top and bottom with both having diameters of 1 1/16 inches. This Unicel C-2601 filter contains 6 square feet of filter media.