The American Plumber W5CIP 5 Micron Standard 10 Inch Undersink Filter is a pack of two whole house cartridges suitable for under-sink use. Made in the USA, these filters have a flow rate range of 2.5 - 5.0 and a cartridge life of 3 months. With an operating pressure of 30 - 125 PSI and operating temperature range of 40 - 125 degrees, they are compatible with American Plumber models and are designed for filtering sediment in water systems.