ITEM NAME:2Pcs 120-150PSI On/Off Pressure Switch for Onboard Air Systems and Train Horn Description: For 12V high-pressure on-board air systems. Ideal for air horns that require high air pressure. Preset to turn on the compressor when tank pressure is below 120 psi, and turn off the compressor. When the air tank pressure reached 150 psi,with a tolerance of ±10%. Can operate reliably up to 3.5 amps. With 1/8inch male pipe thread,and 1/4inch push-on electric terminals. Specification: Voltage: 12V Rated: 120PSI~150PSI Electric current: 3.5A Material: Metal Size: Approx. 5*3*3cm/2*1.2*1.2 Inch Package Includes: 2 Pieces Air Pressure Switch SKU: DMO0016393319398181.2 Pieces Air Pressure Switch. Ideal for air horns that require high air pressure. For 12V high-pressure on-board air systems. Size: Approx.