UPC-certified pressure balance cartridge: the advanced pressure balance ceramic disc cartridge with UPC certification can prevent scald injury caused by sudden changes in hot or cold water pressure. If inlet water temperature changes seasonally, please follow included instructions to readjust the temperature limit stop. The recommended water temperature for the bath or shower is between 90°f - 110°f. All metal: faucet body is made of sturdy brass (non-plastic), ensuring high quality and longevity. The 10-inch extra large rain shower head is made of sus 304 stainless steel while the hand shower body is constructed of brass. 3-function with 1 switch: select between a 10" large square overhead shower and hand shower separately or choose overhead shower+hand shower simultaneously (choose among 3 shower settings with one button). Our shower valve comes with a built-in diverter. The ceramic disc diverter valve provides smooth and easy function-switching operations. Tangle-free shower hose: strengthened stainless steel spiral wound hose is a tangle-free design and can be extended from 1.5 to 1.9 metres, convenient for various purposes, such as cleaning your shower and even bathing your pets. Standard u.S. Threads: our connectors are standard 1/2 NPT tapered threads, compatible with most existing shower systems. All parts are separated by an EPE cushioning (pearl cotton) package to prevent damage in transit. Notice: This shower system is not designed for outdoor use. The maximum distance between the stringer and the front surface of the finished wall is 3.3", and the minimum length is 2.3". The recommended distance is 2.7" for installation.