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 in the animal. Abbott Laboratories thinks our micro tattoo system is a great alternative to ear punches and tags.