The Filbur FC-3963M is a compatible replacement for the following filter cartridges:
The FC-3963M Caldera 50 Microban Pool & Spa Filter is a compatible replacement water filter cartridge for swimming pools and spas. This Filbur pool filter is constructed with high quality Microban technology that reduces the presence of bacteria on cartridges, which results in fewer water-contaminating odors, algae, and mold. This Microban pool filter also boasts Reemay filter fabric that traps particles deep within its sharp pleat folds.
FC-3963M Caldera 50 Microban Pool & Spa Filter specifications: