universal ball holder for ventilation grille

I kept having the problem that the clamp on my cell phone holder in the car came loose.
With the "ball holder for ventilation grille" everything holds.

What you need:
screw nut M 3
Countersunk screw M 3x 30

Printed parts:
1x Base_**x*MM
     Measure the fins of your ventilation grille. Use the gauges and a caliper.
1x Globe_A_**
1x Globe_B_**
     The ** stand for the diameter of the ball you need.
1x Cotter

Filament:
I printed in ASA, PETG should work too.
Don't use PET, it can melt in summer.

Conclusion After a year of use: Use screw locking glue^^

Do you need a size that is not yet available?
Write me a message!