The Aramis Laboratory Animal Microtattoo System is a quick, efficient and affordable method of permanently identifying laboratory animals (particularly mice and rats as early as 1 day old).Designed and tested by laboratory animal technicians, the system utilizes a hypodermic needle at one end of a stainless steel forcep and a small metal cup containing Ketchum Green Tattoo Paste at the other side of the forcep. By squeezing the forcep together, the needle penetrates the toe/foot pad, ear or tail of the animal and injects a deposit of green paste.The Aramis Microtattoo System includes: 2 Hypodermic Needles1 Plated Steel Microtattoo Forceps1 oz. of Green Tattoo Paste1 Aluminum Planchette1 Storage Case