These versatile pens are the optimal choice when it comes to overhead projection, and also work great on almost all other smooth surfaces. These OH Pens have watersoluble ink and a .7mm fine tip. The body has a non-slip grip zone to ensure optimal control. The ventilated cap has a practical clip. This 8-color sets includes red, blue, orange, green, black, pink, purple and brown. Details:Assorted colors8.7mm tip8 countWater-soluble inkNon-slip grip zoneVentilated cap