Replacement part for a Drying Rack (Hinge maintaining the distance between the feets) (See pictures for more details).
See pictures also for exact dimensions.

Recommandations : print at least the male one with “100% filling” and ideally, the bar that goes in the “female part” should be printed horizontally (with supports) to be as resistant as possible.

You will have to force to get the 2 parts fixed together