ISpring FC25BX4 20-Inch Big Blue Whole House Water Filter with 4.5-Inch x 20. Protect Your Family and Household Appliance from Chlorine and More: Say goodbye to smelly, bad tasting water! The FC25B carbon block filter is specially designed to remove up to 99% of chlorine from water as well as various natural organic compounds, taste and odor compounds, and synthetic organic chemicals. Standard Size: Our filter set fits standard 20 x 4.5 housings, Top-Notch Quality: Our FC25B CTO Carbon Block filters are made of high-quality coconut shell activated carbon for maximum filtration efficiency and filter life. Activated carbon is an effective adsorbent because it is a highly porous material and provides a large surface area to which contaminants may adsorb. They are tested by an independent third-party to meet NSF/ANSI standards. We stand behind our products and if you encounter any problems with any of our products please reach out to us immediately. We are happy to help! Please Note: The cartridges are individually wrapped to ensure freshness. Please unwrap the cartridges before use. Unlike an RO membrane, the filters dont reduce Total Dissolved Solids (TDS), and instead keeps healthy minerals in your water. If you are interested in a filter that removes TDS, consider our Reverse Osmosis (RO) systems. All our stock ships from US-based warehouses. As our valued customer, we will do our best to make sure the product you receive arrives to you on time and as expected. The item “ISpring FC25BX4 20-Inch Big Blue Whole House Water Filter with 4.5-Inch x 20″ is in sale since Wednesday, May 13, 2020. This item is in the category “Home & Garden\Kitchen, Dining & Bar\Small Kitchen Appliances\Water Purification\Water Filters”. The seller is “usa.best.buying.experience” and is located in Miami, Florida. This item can be shipped worldwide.