The Unicel C-4305RA R is a compatible replacement for the following pool and spa filters:
The Unicel C-4305RA Comp. Pool Filter Cartridge is a compatible replacement pool filter cartridge built with 50 square feet of Reemay filter media for the reduction of contaminants in pool and spa water. This compatible Unicel spa filter, also known as the Filbur FC-1630M, measures 4 15/16" x 14 7/8" with 2 1/8" Open top/bottom styles. This Unicel pool filter also prevents the growth of mold, fungus, and bacteria through Microban antimicrobial technology.