Stopper
thingiverse
I'm French, and please accept my apologies for my poor English :( You can create any plug to fit your size on a cylindrical object.
Download Model from thingiverse
With this file you will be able to print Stopper with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Stopper.