SpiroPure Replacement for Unicel C-6430 C-6330 Pleatco PWK30 Filbur FC-3915 Hot Springs Spas 31489 71825 Hot Tub Spa Pool Filter Replacement Cartridge (Case of 6)

Outer Diameter: 6" Length: 10 1/2" Media: 30 SF Compatible with Unicel C-6430 C-6430RA C-6330 Pleatco PWK30 PWK30-M PWK30-4 Filbur FC-3915 FC-3915-M Hot Springs Spas 31489 71825 Watkins 30 Hot Tub Spa Filter. SpiroPure pool and spa filter cartridges offer long-lasting, durable filter media with high dirt holding capacity for clear, sparkling water in your pool or hot tub spa. A strong inner core means increased strength without hindering water flow or filtration performance. Easy to install, durable filter cartridges that allow for high filtration performance and efficiency