Black Wet/Dry Adapter/Hose End to fit into the 2 1/2" Inlet on a Wet/Dry vacuum when using a 1 1/4" hose. This 2 1/2" hose end is the same size as the standard large diameter wet/dry utility vacuum hose so it fits into the vacuum the same.   For similar products see our list of Generic Wet/Dry Vacuum Accessories.