Colour ink: Black, Nib type: round, Box of 10 pens, stroke width of 0.75mm, Aerospace marker for permanent and low-corrosion and low-halogen labelling of almost all materials, e.g. plastic / metal and rubber, ink in the aerospace marker is permanent lightfast quick-drying waterproof and wear-resistant, resistant to a wide range of solvents and paints, Without any added xylene or toluene