Feature: 1. Control Switch: This air pump switch can better control the on and off in accordance to the pressure of your machine, safe and reliable. 2. Efficient Works: The adjustment range is -50cm Hg to 1.0Mpa, the output pressure is 0.1-0.3Mpa, and the maximum work pressure is 1.65Mpa. 3. Practical Using: Suitable for pressure control of boilers, ships, refrigeration equipment, medicine equipment, welding machines and so on. 4. Great Materials: Consisting of phosphor copper corrugated pipe and brass pressure joint, the controller is very stable under high pressure. 5. Easy to Install: Light in weight and compact in size as well, the air pump pressure switch is very convenient to install within minutes. Specification: Item Type: Air Pump Switch Model: SNS-110 Adjustment Range: -50cm Hg to 1.0Mpa Output Pressure: 0.1-0.3Mpa Set Value: Off(On): 0.4Mpa On(Off): 0.6Mpa Maximum Working Pressure: 1.65Mpa Maximum Pressure: 10kgf/cm². Package List: 1 x Air Pump Switch4 x Screw1 x Accessory1 x User Manual