The Unicel C-4310 R is a compatible replacement for the following pool and spa filters:
The Unicel C-4310 Comp. Pool & Spa Skim Filter is constructed with 10 sq. ft. of pleated Reemay filter media to improve the clarity and quality of your swimming pool/spa water. This compatible Unicel spa filter, also known as the Filbur FC-3077, measures 4 1/4" x 4" with a 1 15/16" Open top style and 1 9/10" Open bottom style with slots. This pool filter cartridge also features reinforced antimicrobial end caps and reinforced extruded PVC center cores.