Long Stem Valve Caps for Halkey Roberts air valves, namely used on inflatable rafts. These valve caps are no longer made nor supported, but there is still a
...さらに表示 significant number of rafts out there with these valves. These caps are protecting the air valve from arm and dirt.
Print them with Performance/Technical PLA at high temperature and high fill percentage for strong parts. Mine were printed with Materio3D PLA made from Ingeo850 PLA at 225C and at least 40% fill.