... .With using the unit to increase the purity of nitrogen in the tire, good value. Nitrogen Tire Inflator:FEATURES1, 1No*10m/32.8ft ... type chuck2, With using the unit to increase the purity of nitrogen in the tire, the valve cores must be removed manually ... compressed air4, 2 Pre-filters5, 50L/13.2gal(us) internal nitrogen storage tank6, Autmatic inflation.7, Automatic zero drift adjustment8, Remain ...