Made of quality plastic and stainless steel for durable use Type: Quick Connect Fitting Connector; 5/16 Tube OD x 1/4" NPT Easy to install and removed, 360-degree rotate freely, release rings adopt ellipse design, offering good seal property Fluid Type: air, vacuum; Operating Pressure: 0- 150 PSI/ 0-9.9 kgf/cm2 (0-990kPa); Working Temperature: 0-60°C | 32～140°F; Negative Pressure: -100Kpa| -29.5 In H Applicable Tube: PU/ PA/ PE/ PVC