The Omnipure E5621 is a 10 Micron Granular Activated Carbon Block Water Filter used to reduce cysts, scale, taste, odor and chlorine. It is engineered for customers needing a replacement body for existing permanent heads having a universal cap designed for Everpure, Omnipure Elf Series and others. Additional Details ------------------------------ Product description: The Omnipure E5621 is a 10 Micron Granular Activated Carbon Block Water Filter used to reduce cysts, scale, taste, odor and chlorine. It is engineered for customers needing a replacement body for existing permanent heads having a universal cap designed for Everpure, Omnipure Elf Series and others.