Universal pen for use on almost all surfaces | Suitable for overhead projection | Also suitable for use on CDs/DVDs | Excellent smudge-proof and waterproof qualities on almost all surfaces | Dries in seconds, therefore ideal for left-handed users | Permanent, low-odour ink | 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 | Refillable