This cartridge-type roller ball liquid ink pen refills with international short Kaweco ink cartridges, just like a fountain pen! It's a convenient ink system that gives you the smooth flow and color range of fountain pens in a roller ball pen form. The Kaweco Sport Ice Roller ball pen is available in four translucent colors and is made from strong yet lightweight ABS/Terlux plastic.
Pen dimensions: Approximately 4.1 inches (10.5 cm) long closed, 5.1 inches (13 cm) with cap posted x 0.4 inches (10.8 mm) body diameter. Cap diameter: Approximately 0.5 inches (14.2 mm).
The video below shows how to install an ink cartridge in your Kaweco pen:
I like the concept and the size of this pen; so far, it's written wonderfully
with the ink cartridge that I put in. However, the pen doesn't play nicely with
the screw cap. Sometimes, after having it in my front pocket for a while, I'll
try to uncap it to write with, and the nose unscrews into the cap rather than
having the cap unscrew from the body: It should have been made as a snap-on cap.