Specification: Product Name: Motorcycle Fuel Vacuum Gauge Balancer Material: metal and plastic Size: 30.4 cm x 10 cm (L x W x H) x width ) Gauge diameter: 7 cm Main color: blue Type: Vacuum Gauge Sub-Type: Carburetor Balance Indicator Quantity: 1 set connector thread sizes: 2 pcs. M5 + 2 pcs. M6 Installation: Suitable for 4-cylinder machines. Characteristics: - Vacuum gauges allow for easy synchronization and balance of motorcycle carburettors. -Each unit contains precision gauges mounted on a sturdy metal base for tabletop use. - Allows easy synchronization and balancing of motorcycle carburettors - Each unit includes precision gauges mounted on a sturdy metal base for tabletop use, threaded brass carburetor extensions (65mm and 180mm), couplings, and a vacuum hose. The package includes: 1x Fuel Vacuum Gauge Balancer 4x vacuum hose 4x connectors 4x threaded brass carburetor extensions 8x Components Note: 1. We provide clear pictures, measurements where possible. Please check as much as possible to make sure the item is the one you need. 2. (1 inch = 2.54 cm) 3. There are no instructions in this kit.