Stereoscope Eyepiece Lens Dust Cover
Why buy a fancy branded lens cover you're just going to end up losing or getting dirty when it sits on your bench while you work, when you can just print this lens cover for a few cents?
Works for my AmScope. However, can fit any other stereoscope by scaling in the dimension you need. The length approx. 114mm, width 43mm, and height is 20mm, so you can scale accordingly for your need. Simple geometry, should print easily on a wide range of printers/settings/materials. Happy printing!