?EASY WATER FLOW ADJUSTMENT: Mayyaya shower flow control valve allows for controlling water volume or completely shutting off water flow while showering. Enable you to freely control the flow of water. ?CONVENIENT WATER SAVER: Efficient addition to a high flow shower, the valve helps reduce water pressure, no more wasting hot water while getting soaped up. Simple operations can help you save money. ?SUBSTANCIAL CONSTRUCTION: All brass construction with glossy chrome finish, quality material and craftsmanship for durability, resists corrode and tarnish. Compared to plastic, brass has higher durability and elasticity to pressure and heat. ?SMOOTH OPERATION, NO LEAKING: Inner ceramic valve for smoothly sliding the lever from left to right, seals well without leaking, adds this valve to a dripping shower head without replacing all the plumbing. ?STANDARD FITTING, SIMPLE INSTALLATION: Both the male and the female threads are 1/2" IPS for standardized handheld showerhead, wall mount shower head or bidet sprayer. The valves accommodate the majority of shower heads, shower arms, hoses, and water pipelines. Easy to install by hand or wrench.