Frizzlife SKP HF Replacement Housing Kits (4 Pack) With Filter Cartridges Inside for SK99 and SP99 Under Sink Water System

4 Pack Set: Includes 1st stage housing kit (S) *2 pcs, 2nd stage housing kit (C1) *1pc and 3rd stage housing kit (C2) *1pc. Includes the outer plastic housing and inner filter cartridge. Compatible Replacement Housing Kits for Frizzlife SP99 (ASIN B0FZG9RN8C) , SK99 (ASIN B0FZG98PS6) , under sink water filter system. High Filtration Performance: Adopting 0.5 micron purification accuracy, almost 10X higher than other brands. Certified to reduce Lead, Chlorine, Taste & Odor and Particulates. Leave in all the beneficial minerals. Quick Change: With the replacement housing kits, all you need is to shut off water supply and twist to replace the entire plastic housing. If you are looking for the inner filter cartridge set, please search “Frizzlife M3005” on Amazon. It is recommended to change sediment filter every 3-6 months of usage after installation, change 3-5 micron CTO every 8-12 months of usage and change 0.5 micron CTO every 12-18 months of usage after installation (actual service life depends on your water quality and daily usage).