Manual Poly DEF nozzle with stainless steel spout.  Standard for the DEF industry due to it's freeze tolerance, low cost and the intermittent use patterns of the ag/construction fields   Auto shutoff nozzles tend to salt up during intermittent or seasonal use and quit working.  With a manual nozzle that problem is eliminated.  There is a hold open button on the lever.   Ships with a keep clean nozzle bag.