Staedtler Lumocolor Permanent Special Red Marker Fine 0.6mm box of 10 Special pen for many special applications such as coated surfaces, nano coatings, optical glass, laboratory glass Adheres to many special surfaces which other fine markers do not adhere to Airplane-safe: Automatic pressure equalization prevents the pen from leaking on board aircraft Excellent smudge-proof and waterproof qualities on almost all surfaces Dries in seconds, therefore ideal for left-handed users 319F-2 0.6mm