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Snake clip/roll-stopper for fountain pens. Adjustable size: 15 mm +/- 1 mm.
The stopper is slip-on fastening like a finger ring. Please adjust the stopper size to slightly smaller than the pen size then attach to the pen cap or barrel.
WARNING! Please use this product at your own risk. Since you are ordering it directly from Shapeways and attaching it by yourself, I will not take any responsibility if your pen gets damaged by your actions.