Pen Holder Mount Adapter Ring for 14.5mm Pens

This is a Pen Adapter for 14.5mm Pens (e.g. ALDI Rex Permanent Marker) for MPCNC 525 Pen Holder Mount by fyleo http://www.thingiverse.com/thing:1599919

There are two versions with 14.5mm and 15mm. If 15mm is too loose choose the smaller one.