Clear2o Pitcher Replacement Filter, Single CWF1014 Fits CWS100AW, CWS100A, CWS100A2 Clear2O replacement filter has been independently tested for the reduction of aesthetic chlorine taste and odor, and Particulate Class I, and for the reduction of turbidity and cysts (cryptosporidium and giardia). One Filter Cleans 50 Gallons that's Over 88 Pitchers Solid Block Carbon BPA (Bisphenol A) Free