IKEA Stolmen Post Spacer less noise and jiggle

A small spacer for the (discontinued) IKEA Stolmen rack system. The spacer can be inserted into the gap between the two metal parts of the posts. It reduces the play within the post and (very) slightly increases its rigidity. I created it because I do not like the sound from the two metal parts touching each other whenever I use the rack.

Print with 0.16 mm layer height.