www.waterfilters.netSwift-Green-SGF-W01-Refrigerator-Filter.htmlbr The Swift Green SGF-W01 filter is used for Whirlpool side-by-side refrigerators with filter access through the front base grille. The Swift Green Filters SGF-W01 reduces cysts, asbestos, chlorine taste and odor, lead, mercury, and more. The SGF-W01 Cartridge is NSF ANSI 42 certified to ensure consumers they are drinking clean, safe water. Compared to conventional carbon-based filters, Swift Green Filter products are environmentally friendly. Conventional carbon filters are produced by a burning process called open pit charring which releases pollution and greenhouse gas emissions into the air. Swift Green Filter components are produced with a new technology that carbonizes dried coconut shells in an enclosed self-sustaining system while capturing and converting the emissions into useful thermal energy.