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. PP barrel and cap guarantee long service life. DRY SAFE – can be left uncapped for days without drying up. Airplane-safe - automatic pressure equalization prevents pen from leaking on board aircraft. Superb colour brilliancy. Line width F - fine (approx. 0.6 mm). Refillable with refill station 487 17.