Material: Made of brass, this water hose fitting is corrosion and rust-resistant and offers you more durability and reliability for a longer service life.Size: This 1/2 INCH water stop coupling is suitable for garden hoses with a diameter of 13 mm and can be used in conjunction with a water cannon.Easy to install Hose end connection with automatic water stop for changing the attachment without having to turn off the tap.When you turn off your garden shower or lawn sprinkler, the check valve will automatically stop the water flow until you plug in another device, which is great.Structure: This plumbing fixture has with non-return valve missing inside, one side connects to the hose and the other to the end of the water gun, the water automatically stops when the gun is pulled out.