Keep track of your tiny, essential, MagSafe 2-to-MagSafe adapter with this magnetic keychain widget. This part is designed for iron-containing magnetic PLA from ProtoParadigm or Protopasta. Magnets in the adapter keep the two pieces firmly attached.Use the temperature and extruder settings for your magnetic PLA. Print with these settings for best fit and high magnetic attraction: Layer thickness: 100 micron (0.1mm) Shells: 3-6 Infill: 75-100% Each widget should take 8-10 minutes to print.