1.25 inch Lens Cap

thingiverse

This is a lens cap designed for 1.25 Inch Astronomical eyepieces; suitable for all such eyepieces. Ideally, create it from HDPE due to its flexibility, although testing is pending. Additionally, 2 and 0.965-inch sizes are available, along with a 1.5mm air release hole. However, the air release hole has been removed because printed parts aren't airtight, making them quicker and less complex to print. Wall thickness has also been reduced, and the fillet removed from the big-end. Simple instructions: Print and use; avoid losing it like you lost its predecessor.