Product: SG-3B Four-Hole Switch Pressure Range: 0.5-0.8 MPA (90-125 PSI) Model: SG-3A Vertical One-Way Switch Dimensions: 82 x 52 x 127 mm (Length x Width x Height) Rated Voltage: 220/380 V Exhaust Pipe: 6 mm Contact Method: Normally Closed Connector Size: 1/4 Internal Thread inch 2 minutes about 12 mm Outer diameter of pressure relief port: 9.5 mm Maximum current: 16 A Working pressure: 5 to 8 kg (90 to 125 psi) Lifespan: 80,000 times