The Staedtler Lumocolor permanent marker set comprises four permanent markers featuring varying writing widths. The black markers offer round tips for lines of 0.4 mm, 0.6 mm, and 1.0 mm, along with a chisel-shaped point for lines of 1.0 mm or 2.5 mm. These versatile pens are compatible with nearly all surface types. Their smudge-resistant and fast-drying ink make them ideal for left-handed users as well. Moreover, 97% of the exterior material of these pens is made from recycled plastic.