With the STABILO FREE Acrylic T100 acrylic marker set, you can get creative on a wide variety of surfaces such as paper, canvas, or stone. The set contains five coordinated colors with a line width of 1 to 2 mm. The pigmented, water-based acrylic ink offers excellent coverage, is permanent, and is waterproof. As long as the ink is wet, it can be painted over with water and blended harmoniously. The pens are made from over 50 percent recycled plastic. By simply shaking and pumping, the markers are quickly ready for use to create versatile works of art.