Features KDF® and activatedcarbon. KDF is made of a high purity copper/zinc alloy that creates an electro-chemical oxidation-reduction that neutralizes harmful contaminates including bacteria. When combined with activated carbon it removes or greatly reduces chlorine, heavy metals like mercury, VOC, chemicals, sediment, lime/scale buildup and that hydrogen sulfide that causes a rotten egg smell. Without bacteria present in your water, you’ll experience greater performance and longevity from your filter and some of the best tasting water you’ve ever had!Replacement bacteriostatic cartridge for Exterior In-line Water Filter (88-2005) or any standard 10" housing. Up to 11,000-gallon capacity at 2.5 GPM. Addresses bacteria, heavy metals and more. Starburst #5. Priced each.