Constructed of nickel-plated aluminum, the Udor 23.208.84 Trigger Valve is integral to the safe operation of a diaphragm pump and is an ideal component for customizing your own spray gun mechanism. This trigger valve provides a tight connection that prevents air leakage, and it is convenient and easy to install. It is designed with a 1/2-inch female inlet. The durable trigger is made of stainless steel.