1 pack of replacement filters with following :

25 x GAC 10 Inch Coconut shell Carbon Filter

• Size 9 7/8 inch x 2.5 inch - Fits most standard 10 inch size housings and most reverse osmosis systems.
• Fits most standard 10 inch size housings and most reverse osmosis systems.
• Removes Chlorine, Turbidity, Bad Taste & Odor, Sediment, Dirt, and THMS from water.
• Thick Wall Coconut Base Carbon Filter Media - 100% coconut shell carbon Designed For maximum contact between the water and carbon.
• 5 micron filter membrane included to prevent carbon fines to pass from the filter to your drinking water.
• Operation Temperature: 40°F to 125°F
• Low pressure drop through filter.
• Total 25 filters, each individually wrapped.