dual extrusion calibration pieces
thingiverse
I'll recreate this thing with Tinkercad online, just click this link https://www.tinkercad.com/things/9wtXAkpFj40. Print Settings: Rafts are turned off, Supports are off too. Notes for you: print piece number one on the right side and piece number two on the left side.
Download Model from thingiverse
With this file you will be able to print dual extrusion calibration pieces with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on dual extrusion calibration pieces.