Stromberg banjo fitting single end Stainless steel. How cool are these! For perfect proportions, we make them from big diameter material with a recess lip on each side to hide the gasket and move the bolt head moves closer to the banjo. We kept the wrench surfaces short, knocked the corners off the hex and rounded the bolt head too. Theyre sized to fit both 5/16inch and 3/8inch hose, with plenty of fuel flow guaranteed.