Unicel
Used for the Following:
Unicel Swimming Pool 20 Sq. Ft. LA Spas Replacement Filter Cartridge - 5CH-203
Unicel 35 Sq. Ft. Marquis Spa Replacement Filter Cartridge - 5CH-352
Unicel Marquis Spa Replacement Filter Cartridge - 5CH-502
Unicel 47 Sq. Ft. Top Load Replacement Spa Filter Cartridge - 6CH-47
Unicel Waterway Vita Aber Hot Tub and Spa Filter Replacement Cartridge - 6CH-940