LONG NUT HIDES THE SHOWER ARM THREADS — The seamless connection enhances the appearance. Use only on standard 45° shower arms (tubing with male ½" NPS threads). Total nut length: 1.10”. No teflon tape required. AWARD-WINNING — High Sierra's shower heads work the way that nature does by colliding water to create a rain-like cascade of large, heavy, high-energy droplets. They're amazing at washing out shampoo, conditioner, and other hair products. New nylon insert protects metal from limescale buildup. NOZZLE GUARANTEED TO NEVER CLOG — Hard water, sand, or rust particles cannot clog the world’s only single nozzle shower head! Solid metal construction. Shower head angle adjusts effortlessly on low friction ball joint swivel. PUSH-BUTTON trickle valve easily controls the flow of water or shuts it off to just a small trickle while lathering for even greater water savings. Built to last! SAVES WATER AND THE ENERGY to heat it (up to 25%) — WaterSense certified. California Compliant. Pressure compensating. SAVES WATER AND THE ENERGY to heat it (up to 40%) — WaterSense and WaterMark certified. California Compliant. Pressure compensating. High Sierra's 1.8 gpm showerheads are the newest and most innovative high efficiency GREEN showerheads available. This UPGRADED DESIGN with longer nut covers up all of the threads, making it a smooth transition to the shower arm (NOTE: In order to seal properly, only use this model on a standard 45 degree shower arm). The patented technology creates a spray that feels like a much higher flowing showerhead, while saving potentially hundreds of dollars a year in water and energy. The Solid Metal Construction far outlasts the plastic competition in both durability and performance. THIS MODEL IS EQUIPPED WITH OUR POPULAR TRICKLE VALVE. THE TRICKLE VALVE ALLOWS THE USER TO EITHER CONTROL THE STRENGTH OF THE SPRAY, OR TO SHUT IF OFF TO A TRICKLE, WHILE LATHERING, FOR EVEN GREATER WATER SAVINGS. This showerhead is a Green Product, not only from the water and energy it saves, but also because of its compact design. In addition, this shower head is made using lead-free brass. High Sierra Showerheads are the smart choice for homeowners, apartment owners, schools, universities, military, health clubs, hotels -- or anyone looking for the most cost-effective way to conserve water and energy, and provide a pleasing shower experience at the same time. High Sierra Showerheads owns the patent on the FCS nozzle. No other low flow showerhead on the market offers this technology. Certifications: A112.18.1 and WaterSense.