IMPROVES WATER AND VAPOR QUALITY- Reduces up to 98% of harsh chlorine, and addresses other common water contaminants which can damage delicate skin and hair. KEEP THE SHOWER HEAD YOU ENJOY- Easily connects between shower arm and most shower heads (not included). Fits standard ½" plumbing fixtures and delivers 2.5 gallons (9.5 liters) of filtered water per minute. LONG LIFESPAN- Berkey Wellspring Easy-Replace Shower Filter Cartridges last up to 30,000 gallons or approximately 1 year with typical use, and can be swapped out by hand in mere moments.