Swift Green Filters SGF-A1 Swift Green Filter Replacement For 3M A1, 1 Pack Reduces VOC/CTO and Sediment By Americans for Americans. Made in USA. Buyers beware of counterfeiters, always buy from a Swift Green Filters authorized dealer or distributor. High-quality, eco-friendly water filter(s) produced by the leading brand in environmentally friendly water filter products Produced using coconut carbon, which contains 50% more micropores for reducing contaminants, providing cleaner, healthier, and better-tasting drinking water Certification: WQA Gold Seal certified according to ANSI 42 standard for material requirements