Rollerball to Ballpoint Pen Insert / Converter - Plastic Insert

Want to use your rollerball pen, but need to use a ballpoint ink cartridge?  Maybe you need the ability to use a ballpoint pen due to work, carbon copies or other situations where you need the features that ballpoint pens offer.  But, you want to use your rollerball pen.  Use this small insert to convert your rollerball pen to use a Parker style ballpoint cartridge.  Simply insert this converter and you can use your ballpoint ink cartridges.  

You will need a spring from a ballpoint pen to put on the front of a ballpoint ink cartridge, not included.  Or, you can add it to your order above.