1)Convenient One touch fittings provide instant tubing connections: 2)Elliptical release ring help to connect the tube easily by manual, no special tools required. 3)(Nickel-plated )brass threaded bodies ensures anti-corrosion and anti-contamination. 4)All threads are pre-coated with Teflon sealant and require no additional sealing. Technique information: Medium: Air and Water Working Pressure: 0~150PSI Working Temperature: 0-60?C(32~140?F) Air tube connected: Nylon and Polyurethane BSPP, BSPT, NPT thread are available