Markal Lacquer-Stik Highlighter Fill-In Paint Crayon, 3/8" Diameter, 4-1/4" Length, Black (Pack of 12) Paint stays flexible-expands and contracts with the surface Contains no solvents Long-lasting will not rub off or smear No mess or waste-eliminates dripping brushes and paint spills Designed to color-brighten stamped or engraved lines and lettering