Interstate Pneumatics VC660 In-Line Check Valve 3/8" FPT x 3/8" FPT Length: 86mm (3.4 inch) | Outer Diameter: 39.5mm (1.6 inch) Fluid Type: Clean Air | Pressure Range: 0-150 PSI Temperature Range: 20 F -150 F | Maximum Pressure Rating: 225 PSI Lubrication: Not Required Material: Aluminium