2 X Staedtler Lumocolor Overhead Projection Markers, Fine Point, Assorted, 4 per Set (318-WP4) Universal pen writes on almost any surface. Writes on photos, frames, proofs, transparencies, slides, glass, viny and more. Smudge resistant and waterproof. Long-lasting ink is neutral-smelling and dries in seconds. Won't dry out, even if left uncapped for days.