The Airsource A/C Transducer Switch is designed to help maintain safe operating conditions by ensuring pressure inside stays within a safe range. This pressure switch is designed to fit Navistar / International vehicles with a female M10-1.25 3-pin fitting thread size. It is easy to install and helps optimize system efficiency and performance by monitoring the pressure inside the air conditioning system. It is a reliable and durable solution for running your air conditioning system smoothly. FleetPride is your First Click in Heavy Duty®.