Halkey Roberts to Boston Valve adapter

Since there are too many types of valve fitting. This one allows for connecting a pump with a Halkey Roberts valve, used for instance for stand up paddle (SUP) boards, to something inflatable with a Boston valve, e.g. an inflatable kayak.

Boston half remixed from https://www.printables.com/model/43884-boston-air-valve-adapter-two-versions, Halkey Roberts half designed from scratch.

The Sketchup model is a bit rough around the edges - it really should have been done parametrically instead. But prints just fine anyway.

The model and STL are at 10x scale since Sketchup is lousy at sub-millimetre dimensions. Just scale to 10% when printing. Designed to be printed with the Halkey Roberts end down.

Printed on a Prusa Mini with 0.6mm nozzle and 0.3 mm layer preset using Prusament PETG.