Item Details: *100% Brand new and high quality *This Vacuum Gauge 2 Cylinder will help improve the performance of your motorcycle, providing you with a user-friendly method of balancing your carburetor at home without the need for additional tools. The two gauges can be used individually or together, with a pair of rubber connectors on hand to provide four-way balancing. Bra extension bars and a steel back plate make this hard-wearing eential lasting and durable *The vacuum gauge can easily synchronize and balance the carburetor of a motorcycle * Each unit includes precision gauges mounted on a robust metal base for worktop use, threaded bra carb extensions (65mm and 180mm), connectors and vacuum hose *Suitable for 2-cylinder machines The product needs to be calibrated by itself, and there is an operation video on the page, so be careful. *Name: Motorcycle Fuel Vacuum Gauge Balancer *Material: metal and plastic *Size: 15cm x 10cm *Hole Diameter: 7cm *Color: Blue+Black(As Pictures Show) *Type: Instrumentation *Sub type: Carburetor balancing gauge Package Contents: 1*Fuel Vacuum Gauge Balancer 2*Vacuum Hose 2*Connectors 2*Threaded Bra Carburetor Extensions Notes: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightne of your monitor and light brightne. 2. Please allow slight manual measurement deviation for the data .