The MONO twin marker writes opaquely on many materials, including glass, wood, metal, stone, and of course paper. The ink is oil-based and waterproof, and it dries so quickly that it is virtually smudge-proof. Great news for left-handers! It can be painted over immediately without smearing.
The Mono twin has two tips: one 0.8mm round tip and one 0.4mm fine liner tip.
Available in Black, Red and Blue