Overview Reviews Product Description 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 & 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. Lisle Tools Catalog Product Videos Custom Field Harmonization code HTS #8205599080 Manufacturing country US Product Reviews Write a Review Write a Review × Lisle 14mm/18mm Valve Holder Tool 19700 Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *