Product Details For smarter showering, this Hello Klean Refill Capsule fits both the New Shower Filter and Rain Shower. Swap it out every 3-4 months to reduce chlorine, copper, and other unwanted impurities in your water. Only compatible with Rain Shower and Shower Filter 2.0. How To Use Remove the Shower Filter. Unscrew the top or bottom cap. Swap with the new refill capsule. Reattach the Shower Filter onto your tap. Full Ingredients KDF 55 (COPPER, ZINC): REDUCES COPPER, IRON, LEAD, ARSENIC, ALUMINUM, MERCURY, AND METALS. CALCIUM SULPHITE (CALCIUM SALT): NEUTRALISES CHLORINE AND ITS BYPRODUCTS, ENSURING SOFTER SKIN AND HAIR. ; ACTIVATED CARBON (COCONUT SHELL WOOD): TRAPS CONTAMINANTS AND ELIMINATES ODOURS. CERAMIC BEADS (TOURMALINE, ANION): HELPS BALANCE PH LEVELS AND ENHANCES FILTRATION.