Features: Our 3M High Flow Series Replacement Cartridge Kit, Model Cartpak Dp390 Provides Consistent High Quality Water By Reducing Particulate, Chlorine Taste And Odor, Scale, Cyst And Bacteria.Built-In Scale Inhibition Can Help To Prevent The Potentially Harmful Effects Of Scale Build-Up On Equipment. Filtration Media Combines A Membrane With A Premium Activated Carbon Block To Help Provide Excellent Throughput And Cartridge Life. Our Sanitary Quick Change (Sqc) Encapsulated Cartridge Design Allows For Fast And Easy Cartridge Change-Outs Without The Need For A Filter Wrench. This Package Includes Three (3) Hf90 Cartridges And One (1) Hf8-S Cartridge. Creative Filtration Technology.