The Zig Posterman Calligraphy markers have a 3mm flat chisel tip. Not only good for calligraphy writing, but a great tip for artwork and sign-making as well. High quality water-based paint marker; Xylene-Free and odorless; waterproof when dry. Zig Posterman Calligraphy markers are versatile, highly opaque, and light-fast. Suitable for many surfaces, including paper, glass, plastic, metal, wood and stone. Especially effective on whiteboards and chalkboards. **Note: These markers are discontinued, so available quantities of certain colors will become limited.**