FILTER CARTRIDGE food grade material remove the parricles chorine taste and odor work ad the previous cartridge
this AT33 series post inline filters asre usually used as the last stage of the ro system,they are made of the all kinds of filter medias ,like ,carobn ,KDF,resin ,slic sand ,ceramic ball ,,,,
which have dine effect of filtratin for removing the chlorine ,taste ,and odor