Kochek 6" 6NH Female x 4" Storz Fire Engine Elbow I have multiple available I took pictures of what I thought was the unit with most wear. They all have some hard water residue on the outside - not sure if that is common or if they would need new gaskets / o-rings. This is the only unit that has metal wrench damage at the lugs on the 6NH side of the elbow (this unit will be the first to ship). All have some residue inside. Overall very nice units.