The Unicel C-2308 R is a pool and spa water filter cartridge that is the correct compatible replacement for the following filters:
The Unicel C-2308 Comp. Pool & Spa Filter Cartridge has an outer diameter of 2 7/8 inches, with a length of 9 3/4 inches. This Unicel spa filter has an open top and bottom with both having diameters of 1 1/16 inches. This Unicel C-2308 filter contains 8 square feet of filter media.