Universal pen for use on almost all surfaces. Suitable for overhead projection. Can be wiped off film using a damp cloth. Water-soluble ink. Fast-drying. PP barrel and cap guarantee long service life. Airplane-safe – automatic pressure equalization prevents pen from leaking on board aircraft. High colour brilliancy. Black is lightfast. Line width S – superfine, approx. 0.4 mm. Refillable with refill station 487 15. Housing made of 97% recycled plastic.