The Filbur FC-3077 is the replacement filter for the Unicel C-4310 R.
The Filbur FC-3077 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 Filbur spa filter 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.
Part Number: FC-3744
Replaces Part Number: Unicel C-4307 R