Is this 3D model free to download?

Yes, Magnet Sleeve (10x3 or 15x3, d20 or plain) is free to download from Thingiverse. Open it in the free Thinger app, or use the "Download from Thingiverse" link to open the original listing by the creator.

Where do I download the STL file?

The download is hosted by Thingiverse. Use the "Download from Thingiverse" link on this page to open the original listing and grab the file, or save it to your print queue in the free Thinger app.

Designed by Cynthia, published on Thingiverse. Please credit the creator when sharing your print.

Can I print this at home?

Yes. This is a printable 3D model intended for home FDM and resin printers. Check the original listing for suggested print settings.

Magnet Sleeve (10x3 or 15x3, d20 or plain) 3D printable model by Cynthia

Magnet Sleeve (10x3 or 15x3, d20 or plain) photo 1

Magnet Sleeve (10x3 or 15x3, d20 or plain) photo 2

Magnet Sleeve (10x3 or 15x3, d20 or plain) photo 3

Magnet Sleeve (10x3 or 15x3, d20 or plain) photo 4

Magnet Sleeve (10x3 or 15x3, d20 or plain)

Source: Thingiverse by Cynthia

The Magnet Sleeve (10x3 or 15x3, d20 or plain) is a free printable 3D model from Thingiverse by Cynthia. I needed some double-sided magnets to go with NeveroddoreveN's amazing Questorium GM screen (seriously, check it out, it's so good). You can download the STL file from the original listing below and print it at home.

Open in Thinger (free) Download from Thingiverse

30 saves Source: Thingiverse Updated 2026-10-22 License: CC-BY · commercial OK Category: Decor & Art

Tags: D20, dnd, dungeons and dragons, fridge magnet, fridge magnets, magnet, Magnets, whiteboard magnet

About this model

I needed some double-sided magnets to go with NeveroddoreveN's amazing Questorium GM screen (seriously, check it out, it's so good). Most of the embedded magnet models have a pause for adding the magnet mid-print, but since I use a steel nozzle that doesn't work. Instead, I have a sleeve that you drop the magnet into, followed by a retaining plug. There are four types of sleeve: plain-sided and d20-themed for each of 10x3 and 15x3 round magnets. I recommend a brim for the sleeves (there's not a lot of plate contact), but no supports needed. The plug is pretty tight, so you may not need glue, depending on your printer. If it seems a bit loose, a drop of CA glue works.

Frequently asked questions

Is this 3D model free to download?: Yes. Magnet Sleeve (10x3 or 15x3, d20 or plain) is free to download from Thingiverse. Open it in the free Thinger app, or use the "Download from Thingiverse" link above to open the original listing.
Where is the STL hosted?: The download is hosted by Thingiverse, not by Thinger. We link you directly to the original listing by Cynthia.
Who made this model?: Designed by Cynthia, published on Thingiverse. Please credit the creator when sharing your print online.
Can I print this at home?: Yes. This model is intended for home FDM and resin 3D printers. Check the original listing for suggested print settings like layer height and supports.