This 800 square nib permanent marker is ideal for writing, marking and labelling on almost all materials, including metal, plastic and glass. The ink is waterproof and wear-resistant on almost all surfaces, and the chisel nib has a stroke width of 4-12mm.Details:Available in multiple colorsSquare chisel nib (4-12mm width)High-quality aluminum barrel offers a sturdy, comfortable gripLow-odor ink has no added toluene/xyleneCap can be stored on the end of the barrel to prevent risk of losing itMade in Germany