Barograph Pen Felt Tip Cartridge Purple Ink T9428 F51079A06R05

The Barograph Pen Felt Tip Cartridge (Purple Ink) works on 90% or more of recorders. This cartridge pen is purple in color, lasting an average of 2 years. The biggest advantage is once you remove the cap at the tip, and slide its tapered sleeve onto the pen arm, there is zero maintenance. The only drawback is that it leaves a very fine trace. Those who desire a bolder trace can try to blunt the fine point just a little, or opt for the Metal Pen Nib and recorder ink. **MXFTP once stood for Maxant Felt Tip Pen**