Finish :Chrome The High-Output Shower Filter (HO) contains a reversible filter cartridge that will filter the shower water for one year. This high performance shower filter combines easy operation and maintenance with the ultimate in structural integrity and over-all reliability. The HO is the strongest replaceable shower filter available on the market today. Shower Filter with Adjustable Showerhead. Filters Chlorine, Dirt & Odors. One replaceable filter model HOC included. Rated for 20,000 gallons or 12 months, which ever comes first (individual water conditions may vary).