Delrin Tank Dun Dust Cap

            Delrin Tank Din Dust Cap   The dust cap keeps crap out of your valve.  This way when you put your regulator on there is nothing in there to keep it from sealing.   Delrin This is a solid style one with a hole in the center for the string.  This version is a tougher one.  It is made of machined delrin and holds up to years of abuse.