Interstate Pneumatics FMS144S 1/4" MPT x 1/4" Male Swivel Barb Connector - Steel. Permits rotation of fitting without kinking and twisting of hose. This professional contractor / professional grade hose barb is machined from a solid brass stock using CNC machine center. Brass is corrosion resistant and provides a tight seal on the hose. For use with PVC, PU, Rubber hose or tubing and to be secured with a hose clamp or crimped ferrule.