This reverse threaded wall-end piece is designed to screw onto 1 3/8" diameter central vacuum hoses. The metal band surrounding this part causes your vacuum to turn on whenever the hose is plugged in. This part CANNOT be used with Low Voltage or Electric hoses, as there are no wires or connections associated with this part. This part simply screws on to the end of a bare hose allowing you to connect it to an outlet, creating an air hose.
This part is incorporated into the .