Product Dimensions 2.9" x 0.7" x 5.9". 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 (Test ISO 554). Airplane-safe - automatic pressure equalization prevents pen from leaking on board aircraft. Xylene and toluene-free ink. Superb colour brilliancy. Lightfast colour black. Line width fine approx. 0.6 mm. Refillable.