Verbatim MultiMedia Markers are ideal for use with CD-R/RW, DVD, CompactFlash and SmartMedia products. Each pack contains four markers: red, green, black and blue. Excellent for labeling both data and music CDs. Each pen offers a quick and effective way to write on data storage surfaces.¤¤Each pen gives permanent lettering and has a soft round tip so as not to damage the data storage layer. It also uses odorless, solvent free pigment ink, which is quick drying.