ITEM NAME:Fuel Pump & Vacuum Gauge Description: Tests both mechanical and electrical fuel pumps. Checks for worn or defective parts in fuel pump and vacuum system. Diagnose improper timing, burned or stuck valves, leaking manifolds, improper fuel mixture, stocking choke and many more Suitable for use on most vehicles. Can be used to diagnose:Spark misfires,Poor engine compression, boost gauge,Fuel pump testing. Specification: Material: Plastic Size Chart: Size: Approx. 160x100x35mm/6.30x3.94x1.38inch Package Includes: 1 Set Fuel Vacuum Fuel Pump Pressure Tester Gauge 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.Can be used to diagnose:Spark misfires,Poor engine compression, boost gauge,Fuel pump testing. 1 Set Fuel Vacuum Fuel Pump Pressure Tester Gauge. Checks for worn or defective parts in fuel pump and vacuum system.