Staedtler Lumocolor Duo Permanent Markers have a fine 0.6mm tip and a wide 1.5mm tip. They are suitable for almost all surfaces, including overhead projectors.
The ink in these Staedtler Lumocolor Duo Permanent Markers is smudge- and water- proof, and is zylene and toulene free. These pens can be left uncapped for days without drying out. They are aeroplane safe, having automatic pressure compensation which prevents leakage.
Price per marker.