Generic Push in Quick Touch to Connect Fitting 8mm OD Tube x 1/4" Male NPT Thread Pneumatic Straight Joints/Coupler (Pack of 5) Net Weight: 12.65g/pc Type: Straight Male Connector. Tube and Thread Size: 8mm OD x 1/4" Male NPT Operating Pressure:0-150psi. Quick and simple installation,designed for the polyurethane or nylon tubing.