Product Details For smarter showering, the Hello Klean 2-piece Refill Cartridges fits the New Shower Head 2.0. Swap it out every 3-4 months to reduce chlorine, copper, and other unwanted impurities in your water.; Only compatible with Shower Head 2.0. How To Use Headpiece cartridge: Place wrench (included in the package) onto the tip of the Shower Head with the handle facing outwards. Press and steadily turn the headpiece counter clockwise. Replace the used circular cartridge. Handle cartridge: Twist the handle counter-clockwise to open. Replace the cartridge inside and re-assemble. Full Ingredients REDOX MEDIA (COPPER, ZINC): REMOVES IRON, LEAD, AND MERCURY FOR SAFER SHOWERS, AND NEUTRALISES CHLORINE, LEAVING SKIN SOFT, NOT STRIPPED. AMINO ACID GRANULES: REDUCE DAMAGING METALS TO PROTECT HAIR AND SKIN. KEEPS NATURAL OILS INTACT WHILE NEUTRALISING HARMFUL ELEMENTS. ACTIVATED CARBON (COCONUT SHELL WOOD): TRAPS CONTAMINANTS FOR ODOUR-FREE SHOWERS AND REMOVES CHLORINE AND CHEMICALS THAT D