ACDelco 10-4024 Diesel Exhaust Fluid (DEF) Nozzle - 1 gal The vented design of the nozzle makes pouring easy by helping to prevent glugging It is the same nozzle as originally packaged with ACDelco Diesel Exhaust Fluid Designed to be an exact fit to ACDelco Diesel Exhaust Fluid containers, and is available for either the 1 gallon or 2.5 gallon sized containers