Tapered plastic gas dip tube fits older Firestone kegs and some newer Spartanburg Challenger VI kegs. Replaces old worn out or discolored nylon or plastic gas dip tubes. It does not fit any Cornelius brand kegs. This part is 1.25" long, and has an outer lower tube diameter of .25". It should be used in conjunction with our D67 Dip Tube Sealing O ring.