This is a foot to elevate the Omtech Polar laser cutter for use with the maximum size of tumbler in the rotary. You will need a set of 4. I printed PETG with 25% honeycomb infill, and they seem to be very solid. Would recommend using an infill pattern that is strong against vertical compression like honeycomb, triangles, trihexagon, etc. This raises the unit 36 mm and has 41 mm insets for the feet, per the information on Omtech's website regarding making risers: https://omtechlaser.com/blogs/tips/how-to-make-risers-for-your-desktop-laser-engraver (6 x 6mm height).