The Staedtler Textsurfer Classic highlighter is designed with a large ink reservoir for extended highlighting performance. The fast-drying pigment ink is light-fast and will not smudge ink-jet printing or most handwritten inks. It even features an automatic pressure equalization system that prevents the highlighter from leaking on board an aircraft. The eco-friendly design is refillable with the Staedtler Textsurfer Refill Station, and features a handy clip on the cap. The Purple and Turquoise colors are copy-proof, and will keep your text visible in photocopies. Multiple ink colors available.Highlighter dimensions: Approximately 4.7 inches (12 cm) x 1 inch (2.5 cm) x 0.6 inches (1.4 cm).