Unicel C-2308 Replacement Filter Cartridge | 8 sq. ft. | 9 3/4" x 2 7/8" SCLT The C-4301 is compatible with

The C-4301 is compatible with Nordic Hot Tubs models manufactured before July 1999 only

and 60 square foot models

Easily and safely retrofits into most brand's existing 12" mud frames

Mounts to existing pipe

Unicel C-2308 Replacement Filter Cartridge | 8 sq. ft. | 9 3/4" x 2 7/8" SCLT The C-4301 is compatible withThe Unicel C 2308 is an 8 sq. ft. replacement filter cartridge engineered for the high demand environment of Pentair's Caribe multi element cluster filter systems. Constructed with 3 oz. Reemay 2033 pleated polyester media and 84 precision pleats, this compact cartridge delivers consistent filtration efficiency and extended media life critical when dozens of cartridges operate together as a single filtration bank. IMPORTANT: Multiple Cartridges