Heavy Duty Air Pressure Control Switch, Sunny H4, 4 port, 140-175 PSI, 25 Amp Genuine Puma replacement !!!! Brand New Sunny Heavy Duty Pressure Control Switch, H4, 140-175 psi Brand: Sunny ( Taiwan ROC) Air Compressor Pressure Switches For all global air compressor Model SP-204 UL Listed and CSA Certified. DPST switch ressure Switch, Air Compressor, Standard Action, Factory On/Off Set 140 to 175 PSI ort Type 4-Port 1/4 In NPT (Female), 1/4 In Compression Unloader