This Sprite High-Output Filter Cartridge is a reversible 1-year filter cartridge that fits the Sprite HO Shower Filter. Its unique Chlorgon and KDF filtration media means it will filter out total chlorine - both free and combined - providing for enhanced chlorine removal protection.It can easily be reversed and operated in either direction. Periodic reversing of the filter cartridge not only eliminates channeling (ensuring balanced filtration) but also back-flushes the filter.ﾠ