Calibration box to fine tune Default Extrusion Width, X/Y/Z/E Steps, and Flow Rate

Are your parts not fitting together as they should? Use this calibration tool to fine tune your printer. See the measurements picture for dimensions in millimeters.

When your printer is correctly calibrated, the parts should slide together in a very tight fit. The Y version should fit the X version and vice versa.

Note, the objects have changed slightly since the pictures were taken. The picture with the measurements is accurate.