Tombow MONO Twin Permanent black marker with two durable tips – fine and extra-fine. Works on a wide range of materials, including paper, metal, plastic, glass, vinyl, porcelain, leather, and wood. Two tips provide options for making thin or thick marks of smear-proof oil-based permanent ink. Durable fiber tips stay fresh and firm even after heavy use. Great for marking on shipping labels, boxes, pallets, signs, and more. Water resistant. 0.8mm fine tip; 0.4mm extra-fine tip.