Check the listing for details. GAC GRANULAR ACTIVATED CARBON FILTER 2.5"X10" HYDRONIX 12 PACK. Condition: New. Listed at 99.99 USD. YOU WILL RECEIVE: TWELVE (12) HYDRONIX GRANULAR ACTIVATED CARBON (GAC) FILTER 2.5"X 10" FITS ALL STANDARD 10" HOUSINGS Brand New Hydronix filters offer high performance at the lowest price point. Hydronix filters simultaneously remove chlorine, taste and odor, and organic chemicals that contribute to taste and odor. ALL FILTERS ARE INDIVIDUALLY WRAPPED AND NSF CERTIFIED Get It Fast!! Get a Tracking Number!! For Only $35.00 More, Select USPS Priority Mail at Checkout and Receive Your Item in 2-3 Days and Get a Tracking Number and Up to $50 Insurance Protection. NOTE: USPS does not offer tracking numbers for First Class shipping.WARNING: Domestic USPS packages are not insured unless Priority Mail or Express shipping are purchased. Don’t pay more for less! We ship sooner, faster, and for less than our competitors. We ship immediately. We charge you less than our competitors charge you for slower service. We combine shipping upon request. We will match all verified competitor's prices. We ship internationally. Service makes the difference! NOTE: As a precaution, change your flow restrictor or capillary when you change your membrane.