ITEM NAME:Vacuum Carburetor Synchronization Synchronizer Calibrating Carb Sync Gauges E5M2 Vacuum Carburetor Synchronization Synchronizer Calibrating Carb Sync Gauges E5M2 This vacuum gauge set features 2 precision gauges Each gauge has its own individual damping control and Calibration Control it contains 1 qty x 180mm(M5xP0.8) Brass Extension and 1 qty x 65mm(M5xP0.8) Brass Extension The gauge is universal tool, it only contains 5mm adapters for Honda, Suzuki, buyer needs to buy 6mm adapters for yamaha. Color: black + yellow Material: copper + plastic Gauge reading: 0-38hg Each gauge has its own individual damping control and Calibration Control Gauges are mounted to a heavy metal base intended for bench top use. It can be modified for 4 or 6 cylinder use. Parts included in the Kit: 2 * Table 2 * hose 2 * plastic tube 2* extended copper tube