This listing is for a brand new MaxLINE 3/4" piping by 3/4" male NPT straight adaptor fitting (Part number M8003). This MaxLINE fitting is specifically designed for the MaxLINE 3/4" tubing made by RAPIDAIR and is great for adding regulators, filters, and other equipment in the middle of the air line that need a 3/4" male NPT hook up, also if your trying to hook something up that is not 3/4" you can always use a reducer to connect this fitting if needed. This fitting is made of solid brass and has a double o-ring seal for a no leak connection. Also is has split ring connections for easy disassembly if needed. Rated for 175 psi working pressure.