Strong plastic and metal structure products are sturdy and durable. Easy to install and remove. Mainly used to adjust the starting pressure and pressure shut-off of an air compressor. When the pressure is below 90 PSI, turn on the compressor; when the pressure is over 175 PSI, turn off the compressor. The double meter clearly shows the current pressure value. feature: Condition: 100% Brand New Material: Metal + Plastic Color: as shown Type: 2 phase 1 port Travel voltage: 220/380V < p> Exhaust pipe: 6MM Contact Method: Normally Closed Support Joint Size: 20MM External diameter of the decompression hole: 9.5MM Maximum current: 20A Pressure of work: 5-8KG (90-120 PSI) Period of validity: 80,000 times Pressure range of switching 0.5-0.8MPA (5-8BAR) (90-120PSI) Comment: 1. Due to manual measurement, please allow 0-2cm error. Thank you for your understanding. 2. The monitor is not calibrated same, and the color of the item shown in the photo may be showing slightly different from the actual