Product Name: Motorcycle Fuel Vacuum Gauge Balancer Material: Metal & Plastic Size: 15cm x 10cm Gauge Diameter: 7cm Color: Blue & Black Type: Instruments & Gauges Sub-Type: Carburettor Balancing Gauge Quantity: 1 set Connector rod thread size: 1xM5, 1xM6 (Please confirm that your cylinder interface is M5 and M6) Fitment: Suitable for 2 cylinder machines. Features: -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 a hard-wearing eential that'll last. -Vacuum gauges enable easy synchronisation and balancing of motorcycle carburettors. -Each unit includes precision gauges mounted on a robust metal base for worktop use. - Enables easy synchronisation and balancing of motorcycle carburettors - 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. Package Includes: 1 x Fuel Vacuum Gauge Balancer 2 x Vacuum Hose 2 x Connectors 2 x Threaded Bra Carb Extensions Note: 1.We provide clear pictures, measurements where poible. Please check as much as poible to make sure the item is the one that you need. 2. Please allow 0.5-1 inch difference due to manual measurement.(1inch=2.54cm) 3.There are no instructions included in this kit.If you want to know how to use or install it,please contact us by Email.We will provide help as much as poible.