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BIDULE - Balloon Inerting Device, a Useful Lab Equipment — image 1
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BIDULE - Balloon Inerting Device, a Useful Lab Equipment

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Stop fiddling with syringes when inerting your reaction ! BIDULE allows to easily attach a balloon and a needle tip.

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Model information

License
Creative Commons — Attribution — Noncommercial

BIDULE is a convenient lab device which avoids the hassle of having to cut a syringe and tape a balloon to inert a reaction. It allows faster and safer handling and is reusable. 

The broad, serrated end is to secure an ballon filled with inert gas. The small end fits a needle tip to puncture the rubbery cap on your flask. 

The conical part is useful for in inflating the balloon with PVC tubing for example.

Print broad side down, use a brim if needed. 
I used infill 10-15% but I guess pretty much any percentage will work. 
PLA or PETG works very well.