M-SPA Replacement Spa Filter Cartridge Kit-2 Pack Filter WF-B0300874 for all Mspa Inflatable Spas 120 pleat cartridge with antimicrobial end caps which inhibit bacteria growth on the filter Contains 1 Pair/2 Pieces Filter Cartridges Easy installation; box to use in seconds Designed exclusively for M-Spa products 90 Days Limited Warranty Fits all Mspa Spas Plug and clean