Stabilo Write-4-all Permanent Marker Medium 1.0mm Black (Pack of 10) 146/46The Stabilo Write 4 all Permanent Marker will write on almost any surface, including glass, metal, plastic, wood, photos, foil, ceramics, card, CDs and DVDs. The medium tip writes a line width of 1. 0mm and the permanent ink is heat proof, frost proof, waterproof and lightfast. This pack contains 10 medium black markers. Medium tip writes a 1. 0mm line width The pen writes on over a 1000 different surfaces including glass, metal, plastic, wood,