Staedtler lumocolor permanent universal pen, super fine, black ink, 10/box permanent universal pen is designed for use on overhead film and almost all surfaces. Dry-safe ink can be left uncapped for days without drying up. Low-odor ink offers excellent smudge-proof and waterproof qualities on almost all surfaces. Ink dries in seconds. Ideal for left-handed users. Pen has a polypropylene barrel and cap with clip. Quick-drying ink/pocket clip/water proof/smudge proof/low-odor ink.