Flow restrictor assembly: Comes with a 1/2 NPT restrictor valve and 6 water flow restrictors with different water flow specifications, 1.2/1.5/1.8/2/2 ,2/2.5GPM. You can save water by choosing the right shower pressure reducer Quality Material: Brass and POM shower pressure reducer that won't corrode or leak; the operating temperature is 0-90 degrees Celsius, which is suitable for most household showers or bath mixers Easy to install and disassemble: the installation and disassembly of the shower head are very simple in minutes, applicable to save water and control water flow, practical in daily life Large quantity: shower flow saver suitable for bathroom hand showers and hand showers with an opening of 14.6 mm. The water flow restrictor can also be used for other kitchen faucets to help us control the water flow and reduce the waste of water resources Size details: the valve is approximately 24mm in diameter, 21mm in length, 1/2" thread, suitable for most showers; additionally, the size of the water flow reducing insert is 14 x 16 x 5 mm, suitable size for your daily use. Color of the spacers: purple, blue, yellow, green, orange, white. Contents: 1 x limiter shower flow restrictors. 6 x shower flow restrictors.