Top Quality, Non-Toxic Ink: GLO-STAMP'S unique waterproof ink makes it ideal for both industrial and consumer applications.Prime industrial users include companies in the electronic and medical fields. On the consumer side, the safe, non-toxic qualities make it suitable for marking on the skin at nightclubs, amusement parks, schools, etc.Lightweight and Affordable: Everything about GLO-STAMP is easy to handle - from the product to the price. It is designed to be both portable and affordable in order to meet a wide array of needs for both small and large organization.Kit includes: 1 battery operated ultraviolet light, 1 four ounce bottle of invisible ink, 1 size "00" stamp pad, 7 different rubber stamps, and 1 invisible ink marker.