Pica Dry 4-Piece Classic 534 Instant Dry Permanent Marker Set permanent pens designed for instantly dry markings. This set includes markers with a fine tip (F) for precise markings and a medium tip (M) for highly visible markings, making it versatile for various tasks. The alcohol-based permanent ink ensures your markings are immediately abrasion and water resistant, suitable for use on almost all surfaces. Additionally, these markers are from xylene and toluene, promoting safer use. Model Number: 534