The Carbon Block CTO water filter cartridges by Express Water are used for reverse osmosis systems & other water filtration systems. This filter has been tested and verified by independent Laboratory testing and also meet the NSF Standards and Industry Regulations. Key Specs include a 5 micron nominal rating & removal of Chlorine, organic chemicals, unnatural tastes and odors found in TAP water. This Carbon filter treats 6,000 Gallons of water at 1.0 Gallon Per minute. This causes a perfect flow rate that result in High chemical Absorption and Efficient VOC, TOC, and Turbidity Reduction. The construction of the cartridge allows maximum service life and high performance. This filter is compatible (will fit ANY) with a universal industry standard Reverse Osmosis Filtration unit or any other water filter unit with a 10" inch cartridge housing. This filter is sealed and wrapped for sanitary standards. Maximum Operating Temperature: 125 degrees F Maximum Operating Pressure: 250psig Maximum Differential Pressure: 100 psid Collapse Pressure: 200 psid This cartridge must be placed in an appropriate housing and flushed for a minimum of 10 minutes prior to use. All information presented is based on data believed to be reliable. It is offered for evaluation and verification, but is not to be considered a warranty of any kind. WARNING: For drinking water applications, do not use with water that is microbiologically unsafe or of unknown quality without adequate disinfection before or after the unit. Activated Carbons are NOT designed to kill or remove bacteria or viruses.