Mercury Free Carburetor SyncPro™ Tool - Precise four-channel vacuum indicator designed specifically for intake synchronization of engines with multiple carburetors or throttle bodies - Includes manometer fluid, hoses, 5 mm adapters, in-line restrictors and instructions - Spill-proof design means the tool can be stored in a horizontal or vertical position - For use with any two-, three- or four-cylinder 4-stroke engines - 5 mm adapters are used on many Honda and Suzuki models - Includes hang hook to clip onto the handlebars for easy use - Most Kawasaki models do not need adapters - Unaffected by barometric pressure changes - Mercury-free design