CuZn UC-200 Under Counter Water Filter - 50K Ultra High Capacity - Made in USA Features: - Simple to install, only takes a few minutes. All you will need is an adjustable wrench for tightening connections. NEW Install Video Instructions Available! (see product description for details)! - 3 Stage Filtration Process: Micro Sediment Membranes, KDF-55 & Acid Washed Coconut Shell Carbon - Unlike Carbon Only Filters, The UC-200 is Bacteriostatic and not susceptible to mold or bacteria growth.