Replacement chin ventilation button for the Schuberth C5 motorcycle helmet. Designed to be a tight snap fit and NOT toggleable. Great if you lose yours or if you just don't like that this button is so easy to accidentally toggle. I've included an open version and a closed version so you can choose your preferred state.

I recommend printing with PETG in the same orientation that the stl files are, with supports on at 100% infill.