Customizable Grommits (and plugs)
thingiverse
Sorry, but this thing isn't about British claymation. ;) Rather, this thing is for creating rubber grommits commonly to seal pipes or wires passing through a sealed container. You can also do a plug which is just a grommit with no hole. It is also a test of my "auto units" library, so for many values you can type in most anything you want and it should "do the right thing". This thing also lives on my projects blog, here: https://theheadlesssourceman.wordpress.com/2017/07/13/customizable-grommits-and-plugs/
With this file you will be able to print Customizable Grommits (and plugs) 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 Customizable Grommits (and plugs).