Heavy Duty Air Pressure Control Switch, Sunny L4, 4 port, 95-125 PSI, 25 Amp Brand New Sunny Heavy Duty Pressure Control Switch, L4, 4 port, 95-125 PSI, 25 Amp Air Compressor Pressure Switches For all global air compressor and water applications. Model SP-204 UL Listed and CSA Certified. DPST switch Rated 25A Temp. range: -22 to 257F Pressure Switch, Air Compressor, Standard Action, Factory On/Off Set 95 to 125 PSI