The charcoal filter cartridge removes up to 82% of the chlorine and other impurities found in tap water, significantly improving the taste of the water and coffee. Replace filter every six weeks or after 60 pots of coffee, whichever comes first. Please be sure to order the correct filter for your Capresso drip coffee maker. 3-pack charcoal water filters For use with Models: Capresso Elegance CoffeeTEAM models #451, #452, #453, #454 CM200 & CM300 MT500 & MT500 PLUS MG600 & MG600 PLUS MT600 & MT600 PLUS MT900 & MG900 NOT for use with Models: #446, #464, #465 or #490