Used to adapt a hose to fit Budd or Kenmore / Sears inlets and others that are 1.25 inch diameter (ones that start suction when OPENED). This adapter tightly slides into the end of the hose leaving the tapered end visible (we recommend tapping it in AT LEAST 3/4 INCH with rubber mallet or piece of wood). It fits into all Low Voltage, Electric Hoses, and Stretch Hoses. If it needs to go into a Basic Hose, it will only fit the Basic Hose with Tapered Cuff. (Note: the Reduced Tapered Cuff product is made up of the Tapered Cuff and this Metal Stub Tube.)