COMPATIBLE WITH COBBE ONLY: The replacement filter cartridge is specifically compatible with Cobe handheld shower head models: B0BJDPJNN3, B0BJDQDZCT, B0C89S355H, B0DBQM3YFH, B0DBQSZTKS, B0DBQH3Y2P, B0CBBWWHZ7, B0CBBT6QVZ, B0C7GVK7CB and B0DKN95FY9. Note: It is not compatible with shower heads from other brand FILTRATION SYSTEM: The shower head replacement filter compatible with Cobe features a filter medium, with the core ingredients, KDF-55 and calcium sulfite balls, making up 50% of the composition. This powerful combination boosts filtration efficiency by 80%, IMPROVED SKIN & HAIR HEALTH: By improving hard water, this showerhead filter replacement helps your skin and hair retain moisture, minimizing dryness and irritation. It's especially beneficial compatible with those with sensitive skin or existing hair concerns FILTER REPLACEMENT FREQUENCY: compatible with best results and continuous water purification, we recommend replacing your filter cartridge every 3-4 months or after 12,000 gallons of use. Note: Your local water quality and usage can impact the filter's lifespan EASY, TOOL-FREE INSTALLATION: Replacing your replacement filter is quick and simple. Just open the shower head housing, remove the old filter, and insert the one. Make sure the washer is properly seated compatible with a leak-free seal-plus, a silicone drain cover is included as a bonus to prevent drain clogs and keep your bathroom tidy Color: White Material: plastic Package Contents: 2 Pack Replacement Filters Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.