BUILT TO LAST A LIFETIME - Unlike cheap plastic shower heads that break and leak easily, HammerHead Showers are made of solid metal and reinforced with commercial finishes that will never peel or rust. Universal 1/2 inch plumbing adapter works with all types of shower heads and shower arm extensions. Easy installation between shower arm and shower head. Flow limiter free, so the flow rate of your shower head is not reduced. At HammerHead Showers we not only make solid metal shower products, but make them easy to install in minutes. In each box you will receive (1x) swivel adapter, (1x) pre-installed rubber disc, (1x) roll of thread sealing tape and easy to read installation instructions. Justin Ball here, founder of HammerHead Showers. Having worked in my previous employment for Moen Inc. I know the product listing does not end at the point of sale. And that's why you have an expertly trained customer support team (which I personally trained). Whether you have a question about specifications, installation, or a warranty claim, you can rest assured that you are well taken care of., Manufacturer: HammerHead Showers