Fuel Vacuum Carburetor Synchronizer Adjustment Tool Kits Extension Tubes 4pc

4x extension tubes(3.9 x 52mm). 4x extension tubes(3.9 x 122mm). 4x synchronizers with fixed plates (vacuum). 8x tubes with conical type connectors( 8mm x 40mm). 4x tubes 10mm x 53mm ( M6x0.75). enable user to hold vacuum values in use.