Pure Brass Spray Nozzle, with Adjustable Spray patterns water spray nozzel. material : Made of solid brass, resistance to corrosion and no rust, quality and durable material provides years of extended use. Note : is a flow controller to make your water flow as large as possible, but it is not a pressure booster.spray patterns and flow volume are at your fingertips,The 4-inch length conforms to ergonomic design, and it is also good to hold and use by hand. It is a flow controller to make your water flow as large as possible, but it is not a pressure booster.