This adaptor slides onto the shaft of the pump, and sits under the handle to extend the overall length of the pump.
This is useful if your pump is slightly too short to properly attach to the pump peg on the frame.
This was specifically modelled to fit a Zefal HP. I suspect it will fit a Zefal HPX, and possibly other makes as well.
6cm in length. Cut to the distance your pump is short + 0.5cm so some spring pressure is applied to the pump peg, preventing the pump from falling out.
Place the adaptor in hot (nearly boiling) water for a couple seconds to allow the plastic to deform and slide onto the shaft. This is required.
This has been working fine with PLA for about 3 years.
The author marked this model as their own original creation.