Zig markers are double-ended, with two chisel nibs for calligraphy and lettering.  Large nib is 5.0mm and the small nib is 2.0mm. The water-based pigment ink is photo-safe, waterproof, acid-free, odorless, xylene-free and lightfast. 

These are more of a "craft" marker than a hardcore vandal tool, however many hand style masters love these for scripts and technical lettering. Especially good for handmade stickers and blackbooks. 

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Çolor Qty
Black
Gray
Green