This is a pack of 4 Staedtler Marker Pens in assorted colours, which are flipchart markers with bullet tips and water-based ink.Staedtler Marker pens have excellent smudge proof and waterproof qualities on almost all surfaces including CD/DVDs due to the fact that the ink dries in seconds. This also makes them very useful for left handed users.Writing in permanent ink suitable for most surfaces, this Staedtler permanent marker is ideal for a variety of uses including posters, signs, artwork, flipcharts and presentations.