New Monteverde Capless Gel Refill allows you to convert your ballpoint pen into a capless rollerball. This is a high quality metal refill with finest-quality gel ink that offers smooth and comfortable writing.
Monteverde Capless Ceramic Gel Parker Style Ballpoint Refill - Extra Fine Black
Monteverde 'Parker Style' Gel Ballpoint Refill – coloradopen
Monteverde 'Parker Style' Gel Ballpoint Refill – coloradopen
Uni SXR-10 Jetstream Ballpoint Pen Refill - 1.0 mm - Blue
The Epic Refill Reference Guide: Rollerball, Gel and Ballpoints
Monteverde Capless Ceramic Gel P41 Ink Refill Compatible with most Parker Style Ballpoint Pens - Blue (Extra Fine 0.5mm)
4 Pack - Monteverde Capless Ceramic Gel P41 Ink Refill Compatible with most Parker Style Ballpoint Pens - Black (Extra Fine 0.5mm)
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The Pen Addict
Kickstarter, From the Pen Cup