OHPen Universal Pens: Permanent: .4mm / Blue
These pens are the optimal choice when it comes to overhead projection, however they also write on almost all smooth surfaces making them very versatile. They feature either permanent or non-permanent ink (black shaft indicates permanent ink, gray shaft indicates non-permanent, water-soluble) and are available in three tip sizes: superfine (.4mm), fine (.7mm) and medium (1mm).The body has a non-slip grip zone and the ventilated cap has a practical clip.

(Sold in lots of 10)