1.Adapter that connects oxygen supply tubing to standard oxygen systems, cylinders and related products. Swivels 360 to prevent tubing kinks. 2.Tapered and barbed nut and nipple assembly allows secure tubing connections. Improved threading is easier to connect to regulators or flow meters.* Allows oxygen tubing to be connected to a DISS outlet * Oxygen adapter for respiratory care items * 1/4″ hose barb hex nut * Swivel base