I have modeled the threads into this design so it will easily screw onto the universal Schrader valve stem. The Schrader valve stem is pretty typical for most vehicles and lots of bicycles.
You'll want to use a total of 3 color changes for this print. I printed it at .15mm. I also enabled ironing for all top surfaces to give it a cleaner look.
You'll need:
Black, White, and Orange.
First will be black, up to 10.25mm. Then switch to white from 10.25mm to 10.40mm. Next switch to orange from 10.40mm to 10.55mm. Last, finish off the rest with black.
The author hasn't provided the model origin yet.