Air Compressor Pressure Switch Descriptions: 1.Pressure Range:0.5-3.0 bar 2.Max. Current: 8A 3.Male and Female:1/4" 3/8" NPT Air Compressor Pressure Switch KRQ-4 Descriptions:1.Pressure Range:0.5-3.0 bar2.Max. Current: 8A3.Male and Female:1/4" 3/8" NPT,BSP4.Rated Voltage:110V-220V Air Compressor Pressure Switch (TUV,CE,ISO9001)