Tiny little clip to hold foamboard sides into the windows in the sides of a MakerBot to prevent draughts from warping prints.

I held some foamboard against the side of the MakerBiot and drew around the inside of the window hole, cut out the shape and made sure it fits the hole with a little wiggle room.

These clips (I recommend you print them in batches of eight to get a full set in one print) fit on the top and bottom edges of the window hole and the blade part cuts into the foamboard to hold it in place.

You'll need to persuade the board and clips to fit together, depending on the amount of wiggle room you left, but as you can see from the photo, you don't need much.