Pentek CRE-1 # 155159 CRE1 Ceramic Replacement Water Filter Cartridge Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands. Ceramic Element 1 Micron Water Filter. 9 3/4" long X 2 7/8" diameter. 6 per case, sold individually. Ametek # 155159 CRE Series cartridges are manufactured from a sintered ceramic filtration media. They are designed and tested for the reduction of Cryptosporidium and Giardia cysts, and are ideal for fine sediment filtration applications. The fine ceramic media will effectively trap dirt, sediment and cysts down to 1-micron in diameter. A proper fit is ensured, and water bypass is prevented through the use of a knife-edge seal. CRE Series cartridges are easily cleaned with water and a damp cloth, sponge or stiff brush. The filter can be cleaned several times until the diameter at the smallest point is 1-1/2" or the circumference is 4-3/4", extending the cartridge life. Order a case and save even more.