Universal pen for use on almost all surfaces Suitable for overhead projection Excellent smudge-proof and waterproof qualities on almost all surfaces Dries in seconds, therefore ideal for left-handed users Permanent, low-odour ink Lightfast colours: black, brown Weatherproof colour black Stand-up STAEDTLER box PP barrel and cap guarantee long service life DRY SAFE - can be left uncapped for days without drying up (Standard atmosphere according to ISO 554) Airplane-safe - automatic pressure equalization prevents pen from leaking on board aircraft Superb colour brilliancy Line width fine approx. 0.6 mm Refillable