Uni-Ball Pin Pens are ultrafine technical pens with calibrated tips. The ink is smooth-flowing and extremely durable.
Once dry the black ink from these Uni-Ball Pin Pens is completely waterproof and will not smudge even if you spill water on it! It is also completely light resistant and wont fade even under continuous light. These Uni-Ball Pin Pens are available in various line widths.
Price per pen.