GrabCAD
I create this to hold mask if you got too small ear to use average mask.
You can also use bag strap support to increase support made it able to use for long hours too.
(i use pla and print with Longer LK4 which spec similar to Ender 3, so i hope it shouldn't have any problem to print it.)
*if it too small you can print 2 and use almost anything to stick it together to adjust length.
Direct link to the original creator's page
Click the "View on GrabCAD" button above to visit the original model page on GrabCAD. You can download the OTHER, RENDERING, STL file directly from the creator's page for free.
This model is compatible with most FDM 3D printers (Creality Ender 3, Prusa MK3S+, Bambu Lab, etc.) and resin printers (Elegoo, Anycubic). Check the original page for recommended print settings and materials.
Yes, this model is available as a free download on GrabCAD. Some creators accept tips or donations.
Check the license (see original page) on the original GrabCAD page. Most STL files can be modified using free software like Blender, TinkerCAD, or Meshmixer.