Relay Electric Pneumatic Air Control Range 0 to 20 psi Pressure Range 0 to 30 psi Max Safe Air PSI 50 psi Air Connections Barb for 1/4 O.D Plastic Tubing 0.42 SCFM at 20 psi Supply with 1 psi Pressure Drop Voltage (AC) 120 V AC Height (In.) 2 7/8 in 7/8 in Diameter Width (In.) 3 13/16 in Depth (In.) 1 1/4 in Surface Mounted Application For Interlocking an Electric System and Pneumatic Control System Cover and Case Cold Rolled Steel Valve Body Die Cast Aluminum 0 to 100 UL