We designed this to work with several door gab sizes. It works on lots of surfaces being TPU (Natural slate flooring, tile, carpet, and wood to name a few). The design grabs and wedges itself under any door very well. Us your foot to push it into place and a little snug pull back on the door and your locked in. Being TPU it allows it to flex enough to get under the door well.

I took some time dialing in the TPU settings to work with a few brands to avoid stringing. Print straight from the handy app or download it and slice it. I recommend printing in TPU for the best results! Use your engineering build plate and it will print and remove perfectly!