Tri-Squircle
thingiverse
What three-dimensional object will fit through holes that are triangular, square, and circular? The Tri-squircle! I created this by designing a four-inch tall cylinder with a four-inch diameter and then using an isosceles triangle to carve away the sides.
Download Model from thingiverse
With this file you will be able to print Tri-Squircle 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 Tri-Squircle.