Ideal for labeling cables, connectors, tools, splice boxes, trays, and any other materials used in optical or electrical network installations. Its alcohol-based ink adheres quickly and permanently to smooth, rough, plastic, metal, ceramic, or vinyl surfaces, without fading or smudging over time. It resists moisture, sunlight exposure, moderate heat, and constant friction, making it an essential tool for fieldwork. Features a fine tip for consistent lines, cylindrical polypropylene body, and a cap with a secure locking system to prevent ink evaporation. Free of xylene and toluene. Non-toxic. Available in deep black. Genuine Sharpie product, manufactured under international quality standards. Recommended for technical identification in telecommunications, electrical installations, industrial safety, and general maintenance.