Valve holder 300mm Long – Fits 14mm & 18mm Threads Plus 1/4″ NPT

Fitment: Widely use: It can be used for gasoline engines, such as cars, trucks, boats, motorcycles, ATVs, etc. (Not to be used in diesel engine vehicles.). 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 another end to air supply. • The other end is a 1/4″ female NPT which can easily be connected to air hose quick-connect fittings. • Heavy-duty 10″ flexible hose allows easy access to spark plug holes and air supply. • Air pressure helps prevent the valve from falling into the combustion chamber. • 14mm is the standard spark plug size for most all domestic and foreign vehicles. • Compressed air (working pressure 30psi≤P≤300psi).