The Pentair EP-20 20-inch Carbon Block Water Filter Cartridge is a high-quality water purification system designed for residential use. With a 5 micron filtration rating, this white cartridge effectively removes impurities and contaminants from your water supply. Compatible with other Pentair and Pentek models, this unit comes in a convenient pack of 7, ensuring you have a steady supply of clean water for your kitchen or home. The 20-inch length makes it easy to install and maintain, providing a reliable solution for your water filtration needs.