Adapter to enable using the hose (and other accessories such as floor brush) from a Henry (and other Numatic vacuum cleaners) with the ubiquitous Titan vacuums sold by Screwfix, etc in the UK. (And probably under other names in many other countries)
Push fit into the Titan's nozzle, and provides the standard Henry screw threads to connect the hose.
The short version is good for my Titan's regular port, and the long version is good for the exhaust (blower) port.
The author marked this model as their own original creation.