The Unicel C-8425 R is a pool and spa water filter cartridge that is the correct compatible replacement for the following filters:
The Unicel C-8425 Comp. Pool & Spa Water Filter has an outer diameter of 8 15/16 inches with a length of 33 1/8 inches. This Unicel pool filter has an open top and bottom with both having diameters of 4 inches. This Unicel C-8425 filter contains 250 square feet of filter media.