Description: Easy Installation, Durable. High accuracy and easy operation. LED Digital display makes for clear and brilliant definition display when dark Measurement range is 0-150 PSI Simple to fit (3 wires), supplied with electronic sensor(1/8NPT thread). Specification: Material: Metal and Plastic Power: DC 12V Actual Diameter: 52mm/2 Inch Oil Press Sensor Thread size: 1/8 - 27 NPT Digital display: PSI Reading Range: 0-150 PSI Wiring: 3 Wires Red: To Ignition Switch (+) Black: To Battery 12V (-) Green: To Sensor Wire Package Includes: 1 Piece Oil Press Gauge 1 Piece Oil Press Sensor Note: Please allow 0.5-1 inch difference due to manual measurement.(1 inch=2.54cm) Please check the size measurement and the picture carefully before making payment. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please understand,Thank you