This premium Staedtler Lumocolour pen has been specially developed for use on overhead projection film for high intensity, vibrantly coloured presentations. This versatile pen is also suitable for use on a variety of other surfaces including glass, CDs, plastic, porcelain, wood and leather. The water-soluble ink is fast drying to avoid smudging, but can be easily wiped from film after use using a damp cloth. The medium 1.0mm tip is great for neat, legible writing, drawing, diagrams and more. This pack contains 10 black pens.