1 Each. RediSharp Plus markers permanently mark on virtually any surface and features Microban antimicrobial protection that lasts the lifetime of the product. Built-in antimicrobial protection continuously fights the growth of microbes, such as stain-causing, odor-causing bacteria. Unique patented "Thumb Button Cap" allows one-handed cap release. Specially formulated water-based ink will not bleed through paper and is odorless. RediSharp Plus markers are great for CDs and offer rubberized grip for comfort and control. Certified AP nontoxic.