Generic Fuel Vacuum Carburetor Synchronizer carb sync Gauge Kit Rubber Hose The items you ordered will be shipped out in 1-2 business day from Los AngelesCA. And you will receive it in one week. Air flow control is handled by needle and seat valves instead of knobs. This helps to resist the dial indicator "bounce" associated with many other lower quality gauges. Set comes complete with black mold storage case. This kit lets you synchronise the values of the 4 carburettors as well as adjust/set them. Composition : - 4 mano of synchronization with fixed frames (vacuum) - 4 rubber pipes 8x5x750mm - 4 Tubes of extension 3.9x52mm and 4 tubes 3.9x122mm - 8 Tubes of conical type 8x40mm - 4 Tubes 10x53mm (M6x0.75) - 4 Tubes 10x60mm (M6x1.0)