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