90219 140 PSI on, 175 PSI off Pressure switch with 1/8 NPT male port fitting. For 12 volt and 24 volt systems. Comes with 1/8" NPT male port fitting and 16 gauge (20 amp) leads.Pressure switch turns on the compressor at 140 psi and shuts off at 175 psi.Pressure switch is sealed for moisture resistance.,