Material Quality: The shell of the shower restrictor is made of high quality copper, and the flow insert is made of plastic, which has a good anti-rust effect. 3 Different Flow Inserts: The kit contains 3 different flow inserts to meet your needs. 1. The green plug-in reduces the water flow to 7 l / min; 2. The blue plug-in reduces the water flow to 4 l / min; 3. The yellow plug-in reduces the water flow to 9 l / min. Super Water Saving Function: Much like a faucet insert in a basin mixer will cause a reduction in the flow of liquid, while allowing users to enjoy a constant and efficient water diffusion effect. The high performance of the restrictor can reduce water consumption. Easy To Install And Remove: Easily install and remove this water saver tip in seconds. No tools required, just screw it on for easy installation. Wide Range of Uses: Shower hose water flow restrictor set can be installed in bathtub faucet or shower faucet, bathroom water saver is suitable for shower, toilet,