Stop doors slamming into walls, radiators, etc. Lay flat on the ground against the wall or glue/screw to your door to save your walls from being slammed with the door handle. Model is 195mm long and was dimensioned to save my bathroom radiator. Printed in one piece in PLA in about 2 hours on Prusa MK3S.

I added a lip on one side so the spring can lay flat on the ground and it will still catch the slamming door (even if the door is cut off slightly higher to provide a bit more ventilation like in a bathroom).

Can be glued or screwed to the door if wanted. As a bonus, I think it will make a great bouncy toy for pets or toddlers when fixed to the door :)