How I Refill a Pentel Brush Pen with Rotring Ink

I use Rotring Ink to refill my Pentel Pocket Brush Pen. This video shows you how I do it. It’s best to get a 1ml syringe unlike the that I got. By the way, BE CAREFUL WITH SHARP NEEDLES. 1ml syringe on Amazon (affiliate link): Rotring Ink review: