Caran d’Ache Goliath Ballpoint Pen Refill, F (Fine)

A ballpoint pen works by sending ink to a ball at the tip of the pen for writing. Caran d'Ache's Goliath refill has five ink pathways, which finely distribute the ink to the ball, resulting in a feature that makes it less prone to ink buildup, even though it's an oil-based ballpoint pen.