Gridfinity 4x ER11 Collet Holder

This is a simple 1x1x3u Gridfinity widget to hold 4 ER11 collets. It is stackable. 

I don't use magnetic Gridfinity bases, instead preferring Clickfinity type, so magnet holes are not included by default.

If you do want the magnet holes, add the included hole cutout file as a negative part modifier in your slicer.