Features: Itwill 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 The vacuum gauge can easily synchronize and balance the carburetor of a motorcycle Suitable for 2-cylinder machines Specifications: Type: Motorcycle Vacuum Gauge Balancer Material: Metal, Plastic Color: Blue+Black Size(L*W): About 15x10x1.8cm Hole Diameter: About 7cm Package Included: 1pc x Fuel Vacuum Gauge Balancer 2pcs x Vacuum Hose 2pcs x Connector 2pcs x Threaded Brass Carburetor Extension Note: 1. Due to the light and screen difference, the item's color may be slightly different from the pictures. 2. Please allow 0.5-2 cm differences due to manual measurement.