Basically my folks fridge door has a flap that flips open/closed to prevent moisture getting into fridge. The top of it has a peg that runs through a channel. This guide piece broke off, so in comes 3d printing to the rescue. Now it works like it did before. You can either attach using double sided tape or plastic screws after pre drilling some holes. I printed the bottom portion solid and the peg it self in concentric infill pattern for strength.