- For both 14mm and 18mm spark plug threads
- Commonly used when valve springs or valve stem seals are replaced
- Air pressure helps prevent the valve from falling into the combustion chamber
- Comes with two-step fitting for both 14mm and 18mm threads
- Heavy duty 12" flexible hose allows easy access to spark plug hole and air supply
Thread fitting to spark plug hole and other end to air supply. Skin-packed. Shipping wt. 4 oz.