The Magnetic Industrial Marker's permanent ink can be used on all surfaces types (when not overly covered in oil or dust) and in temperatures between -5 to 130 degrees. Perfect for the construction and heavy industries or those working outdoors with its 1-3mm bullet nib, the marker has a handy internal magnet for easy storage. Made from 30% recycled plastic colours in the EU. Print up to 2 colours to marker barrel.