The Pentel Permanent Marker NMF50 is an ultra-fine fineliner, water-resistant, with a metal-clad tip. The pigmented ink is alcohol-based and contains neither xylene nor toluene. The Pentel Permanent Marker NMF50 is a product from the Pentel Recycology range: Pentel Recycology products are environmentally friendly products made from over 83% recycled materials (all percentages are based on the total weight of the product, minus consumables relevant to the product).* Usable on metal, glass, plastic, CDs/DVDs, rubber, and paper.* Water and smudge-resistant.* Writing width 0.6mm - Tip width 1.0mm.* Composed of 83% recycled materials, excluding the ink.