A printable replacement spindle for the original PrintDry filament dryer, which fits Polymaker Cardboard Spools. 

The hole on the polymaker spools is almost the exact diameter of the manufacturer spindle, so it drops through. This one is ~2.5mm wider and should hold the spool snugly. Also works on other spools with slightly oversized center holes. 

There is also a version with a long neck which can fit Polymaker 3kg spools.

The procedural CAD model (Alibre CAD) is also included in the .zip file for easy customization.

You may also be interested in a replacement Spindle Shaft and Base, with removable spindle shaft.