Gas Cylinder Valve Position Indicator

This valve position indicator fits onto a 6-lobe gas cylinder valve and provides a visual indicator if the valve is open or closed.  The design is similar to a product found on Amazon and a model by elikoll.  I created this model from scratch using a similar design concept to fit a 6-lobe valve handle.  

I recommend printing with PETG or stronger materials.  All parts are printable without supports and snap together without extra tools.  The center shaft can be glued on its end to the top piece.  Be careful not to glue the bottom piece to the top piece or the shaft.