The Unicel C-2604 R is a compatible replacement for the following pool and spa filter cartridges:
The Unicel C-2604 Comp. Pool & Spa Water Filter is constructed with pleated Reemay filter media and reinforced antimicrobial end caps. This pool filter cartridge improves water clarity and quality through 6 square feet of premium media. This compatible Unicel pool filter, also known as the Filbur FC-2310, measures 2 7/8" x 9 3/4" with 1 1/16" Open top and bottom styles.