Notes: Please allow small errors in size due to manual measurement. The color might be slightly different due to different displays, please refer to the actual products. Please read the size instruction carefully before ordering. Nice combination: package comes with a1/2 NPT restrictor valve and 6 pieces water flow restrictors with different water flow specifications and in various colors,1.2/ 1.5/ 1.8/ 2/ 2.2/ 2.5 GPM; shower pressure reducer,can choose suitable one to apply Good helper for household showers: featuring brass and POM material, shower flow reducer is safe and reliable to use; The working temperature is 0 - 90 Celsius, which is suitable for most household showers Easy to install and disassemble: it is easy and simple for you to use shower flow limiter to control the water flow rate, applicable for saving water and controlling the water flow rate, practical in daily life Useful and wide application: shower flow saver fits for bathroom handheld showers and head showers; Meanwhile, kitchen faucets can also be applied to help us control the water flow and reduce the waste of water resources Size details: restrictor valve measures about 24 mm in diameter, 22 mm in length, 1/2 inch thread, suitable for most showers; Besides, the size of the insert reduces water flow is 14 x 16 x 6 mm, suitable size meet your daily usage