Outer Diameter: 4 1/4" Length: 8" Media: 5 SF Compatible replacement for pools that use Pleatco PC7-120; Unicel C-4607; Filbur FC-3710; Intex Pools 29000E, 59900E, Type A, 59900, 58631, 58623, 108R F18; Coleco F-120 DR-7; Aqua Leisure Size 2; Intex Wet Set Easy Set Size A or C; Intex Sand N Sun Krystal Clear; Aqua Leisure Simple Set; Swimming Pool 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 SpiroPure SP-PS-3710 Hottub Spa Pool Filter Replacement Cartridge. Easy to install, durable filter cartridges that allow for high filtration performance and efficiency