• Staedtler Lumocolor Permanent Universal Medium Line Pens 4 pack in assorted colours for use on overhead projector film and almost all surfaces. • Produces a medium line 1.0mm width. • Dry Safe ink so pen can be left uncapped for days without drying up. • Includes stand-up Staedtler box. The ink of these Staedtler Lumocolor Permanent Universal Medium Line Pens feature high smudge-proof and waterproof qualities on almost all surfaces. They are for use on overhead projector film and almost all surfaces including CDs and DVDs. The Dry Safe ink means that the pens can be left uncapped for days without drying up. The ink is also fast drying which means the pens are ideal for left-handed users. A polypropylene barrel and cap ensures a long service life for the pen. These pens are airplane-safe and the automatic pressure equalisation prevents the ink from leaking on board an aircraft. They come supplied in the practical stand-up Staedtler box. Medium line width is approximately 1.0mm. Additional details: Packaging size: 150mm x 50mm x 20mm