This is a full set of clips, tops and feet for a 6mm metal clothes horse, dryer, airer.
Either print out what you need or replace the lot with a nice new set.
Print with a 10% infill to give the clips a little bit of movement which helps clipping them to the metal bars.
Available to tinker with here:
https://www.tinkercad.com/things/hdnZfELBaSV
The author hasn't provided the model origin yet.