Our Coilflow automatic industrial series couplers are designed for stationary mounting where a simple "one handed" push-to-connect operation is desirable. These automatic couplers feature a compact size, quality all brass, rugged construction and are interchangeable with all other manufacturer's industrial interchanges. Automatic couplers are available in four different body sizes with male or female thread connectors up to 3/4 in NPT; also with hose barb up to 1/2 in ID. Hose.