monocular telescope cover

This is a cover for toy monocular telescope (Spiegelburg Teleskop). Inner diameter ist 39mm.

Print settings for your needs.
I printed mine with 3 rows all around and 25% Infill and no support.
Turn STL with bottom directed to printer plate.

Place a stripe of duck tape on the covers inner side (about 350°). This gives best stickiness for the cover and a small air release.