ITEM NAME:2x Carburetor Carb Synchronizer Vacuum Gauge Tool Balancer for Motorbike Description: Brand New & High Quality Excellent quality vacuum gauges enable easy synchronisation and balancing of motorcycle carburettors. 2 Gauges included only Each gauge has damping control and calibration control. Easy to install, instructions is not included Specification: Material: Plastic Diameter: Approx. 70mm/2.8 inch Height: Approx. 25mm/1 inch Package Includes: 2 Pieces Carburetor Synchronizers.2 Pieces Carburetor Synchronizers. Excellent quality vacuum gauges enable easy synchronisation and balancing of motorcycle carburettors. Height: Approx.