1 set of replacement filters with following. 6 x 20 Inch Big Blue 5 Micron CTO Carbon Block Filter. Size 19 7/8 inch x 4.5 inch fits most 20 inch Big Blue housings. Carbon block filters are extremely effective for removing chlorine taste and odors from your drinking water along with sediment removal. Operation Temperature: 40°F to 125°F. Operation pressure 25 to 75 PSI maximum. All 6 filters are individually wrapped. The item “6 Big Blue 20×4.5 Whole House CTO Coconut Shell Carbon Block Water Filter” is in sale since Friday, August 21, 2020. This item is in the category “Home & Garden\Kitchen, Dining & Bar\Small Kitchen Appliances\Water Purification\Water Filters”. The seller is “max.water” and is located in Concord. This item can be shipped worldwide.