Feature●Commonly used when valve springs or valve stem seals are replaced●Comes with two-step fitting for both 14 millimeter and 18 millimeter threads●Thread fitting to spark plug hole and other end to air supply●Heavy duty 12" flexible hose allows easy access to spark plug hole and air supply●Air pressure helps prevent the valve from falling into the combustion chamberDescription
For Both 14 millimeter and 18 millimeter Spark Plug Threads.