This permanent pen is the optimal choice when it comes to overhead projection, however it also writes on almost all smooth surfaces making it very versatile. Whether you are giving a presentation, taking notes or editing a document, this handy pen will serve you well! Black shaft indicates permanent ink, while the ventilated cap has a practical clip for placing in pockets or notebooks. Body has a non-slip grip zone for easy writing.Details:Green0.4 mmPermanent inkNon-slip gripCap off time of up to 3 daysFor use on smooth surfaces