... copper. 3. long life, anti-acid, and corrosion Water faucet filter accessories1)fit for all faucet2)size have :M16X1,M18X1,M20X1 ... ,M22X1,M24X1,M24X1,M28X13) filter:normal brass filter,stainless steel 304,anti-acid, anti-corrosion,Disc ... filter screens: round filter discs with multiple mesh layers, leaf filters, pack filters, strainers and sieves or other forms. water faucet filter ...