United StatesPrusament PETG Magnetite 40% Grey 1kg (NFC)
Filament color
About PETG Magnetite 40% Grey
Prusament PETG Magnetite 40% Grey is a material with paramagnetic properties. This filament is suitable for making various electronic parts, such as switches, potentiometers, induction loops, electromagnetic shielding, etc. In hobby use, the material can be used for various tools that can be attached to a magnet. Another use can be found in art, design, and toys. Or, it can simply work as a weight.
Printing Setup
| Nozzle | 270±5 °C |
| Heatbed | 100±10 °C |
| Recommended Steel Sheet | Textured / Satin |
Basic Attributes
New spools equipped with OpenPrintTag
Prusament filaments are wound on a redesigned spool that introduces several improvements for an even better printing experience, starting in October 2025. The new spool features a simple locking mechanism that makes disassembly quick and easy, allowing effortless refills. It also stays secure during filament drying, even at higher temperatures. And with its slimmer dimensions, the spool ensures compatibility with a wide range of multi-color and multi-material printing systems.
Every new Prusament spool now comes with a fully rewritable NFC tag powered by the OpenPrintTag standard. It’s designed to work across brands and ecosystems. It is free to use, free to extend, and open for anyone to build upon. Most importantly, it works entirely offline. All essential data is stored directly on the tag. Your printer can recognize the spool instantly, with no dependence on cloud services or vendor lock-ins. The OpenPrintTag attached to your Prusament spool contains essential data about the material and can be read with the Prusa mobile app.
Read more in our announcement article.
What can you expect?
Prusament PETG Magnetite 40% Grey is our own in-house made PETG filament filled with Magnetite powder. The whole manufacturing process is closely monitored and tested - we guarantee ±0.03mm precision.
You can inspect the parameters of every spool we made at prusament.com. Check the sample spool!
Manufactured In-House By Josef Prusa
We were not satisfied with the quality of filaments on the market. So we decided to make our own! Prusa Research is the only 3D printer manufacturer with its own filament production.
Premium-Grade Materials And Thorough Testing
The whole manufacturing process is closely monitored and tested – string diameter, color consistency, and mechanical properties – to make sure that every spool is perfect.
± 0.03 mm Manufacturing Guaranteed Precision
We believe the industry standard of 0.05 mm isn’t sufficient for perfect 3D printing. Instead, we guarantee ±0.03mm precision and highly-consistent colors in our filaments.
High Quality You Can Check Yourself
You can inspect the parameters of every spool we made at prusament.com. Check the sample spool!
Read more about Prusament in the article at blog.prusa3d.com or Prusament.com!
Beginners tips & tricks
A hardened steel nozzle is necessary. The magnetite powder is a highly abrasive material and may damage brass nozzles.
The Prusament PETG Magnetite 40% cannot gain truly magnetic properties at home conditions. In theory, it is possible to magnetize the powder, however, this would require an extremely strong magnetic field, which would require highly specialized equipment.
You can find more in-depth printing tips in our article at blog.prusa3d.com and in our Material table.
Notes
Prusament PETG Magnetite 40% Grey is made in-house by Prusa Research.
1.75 mm filament is manufactured with a precision of ±0.03 mm.
To dry the filament, please follow the instructions in our article.