Plotter Pen Holder (Mimaki Pen Plotter)

Pen Holder for Pen Plotter;specifically for the Mimaki Plotter Centers the pen and holds it tight for precision plottingTwo versions:4mm inside diameter for the muji refill gel ink ballpoint pen6mm inside diameter for anything else outside diameter at 8.4mm for the standard mimaki pen holder to hold this penholderthe slit that goes along the model is at 2mm to have the screw of the original penholder squeeze the model,for a firm grip of the pen :) length ath 30mm