Dual-Function Shower Head: Oblong rain shower head features a full coverage spray with Katalyst technology, and a deep massage spray to target sore muscles; shower head rainfall has a flow that is ideal for everyday use, 2.5 GPM (9.5 lpm) max flow rate, Matte Black Easy to Use, Easy to Clean: Kohler rain shower head with an optimized sprayface and Katalyst technology for a more powerful spray; shower head features a durable finish that resists corrosion and tarnishing, and a MasterClean sprayface that is easy to cleanse, helping prevent mineral buildup Easy to Install Rainfall Shower Head: Upgrade your shower system with this ceiling-mount shower faucet using the included optional diverter (K-737-K) for rainhead outlet valve control; this diverter valve is not required when using a multi-outlet valve Additional Hardware and Equipment Needed: Shower head does not include a two-function rainhead arm and flange, which are sold separately; choose showering accessories and showering components from the Statement collection for a coordinated shower faucet set ASME and DOE Shower Heads: Kohler shower heads meet the DOE Energy Policy Act 1992 and ASME A112.18.1/CSA B125.1 criteria; this product is also registered with the California Energy Commission (CEC) (8.24.21)