The CRF-950Z 2-stage filters are made to fit the PUR CR-6000C Water Filter Pitcher. Each filter provides 2 months or 40 gallons of filtration between changes and reduces up to 99.9% of the contaminants without removing flouride. Stage one consists of an Activated Carbon Microfilter and a Ion Exchange Resin which reduces contaminants. The second stage is made using a Pleated Microfilter that will reduce giardia and microbial cysts found in the water. If you are looking for more capacity try the Pur water dispenser.