Quick translation question: what is the technical term of this part in the english

Quick translation question: what is the technical term of this part in the english language? These are rubber feet for screwing into the end of extrusion profiles to stand on the ground. The rubber-part can move around the ballend of the screw-part by a tiny bit.

c0f465f0da1aed75d0166e5d98ab5a89.jpeg

Leveler.

aka leveling feet:

thank you both.

Rubber-thinga-ma-justable-foot.

Just joking, don’t even pay attention to that.

funny I’m just printing myself a few new of the plastic parts as they are quite used already after only a few months of usage.