Shower filter reduces 95% chlorine, sediment, and bad odors. Chlorine has a drying effect on hair and skin, and may also damage permed or color-treated hair. Screws directly onto existing shower head without tools. Specially designed to maintain the height of your current shower head. Use with replacement filter model No. WHR-140 (included). Filter dimensions: 3" H x 3" W x 4.25" D.