Item: HBA shower filter Size: 51* 175mm Patent NO:20063716.3 Specification: Always patent product, 4 stages water treatment. (single cartridge) The first stage: Stainless Steel Micro Filter The second stage: Imported the USA KDF material The third stage: Granular Activated Carbon The last stage: Stainless Steel Micro Filter Always Shower Puring Water Implement adopts imported highlevel deoxidized complex filtering material as which KDF is regarded center from US. Get rid of dissociated chlorin, trifiredamp, bacteria, rust, impurity, sulfureted hydrogen and heavy metalion, etc., reduce remnants pesticide contents and other matters that cause cancer in everyday life found in water, depress water rigidity, reduce furring and protect the cleaness of the shower water.