Cap lens holder 37-52-58 mm (micro four thirds)

Lens cap holder, originally designed for Olympus lenses 14-42 mm (37 mm cap), 12-50 mm (52 mm cap), or 40-150 mm (58 mm cap) used on micro four-thirds camera.

There is no threading, but I find the layers to be enough of a grip.

Heavily inspired from https://www.thingiverse.com/thing:2211952 (but redesigned with different diameters).