Gel Stick Highlighter glides smoothly over text and dries instantly for a no smudge accent on documents, textbooks, magazines, journals and books. Works on even the thinnest papers with no soaking, bleeding through, wrinkles or smearing, and dries instantly! Gel stick twists up to extend the tip for easy highlighting. Comes in five hot, translucent colors: yellow, orange, pink, blue and green. Acid free and non-toxic. Conforms to ASTM D-4236.