This SCS 129Label is a 2 Inch by 2 Inch self-adhesive label easy to use and provides the Mil-STD-129 ESD sensitivity symbol and attention message to warn that ESD control precautions are needed when opening package and handling contents. This permanent adhesive destructible type label is "tamper evident", letting you easily monitor whether or not a package has been opened. - Use label on unit packs, intermediate, and exterior containers (bags, boxes and totes) to ensure proper ESD warning. The ESD warning symbol and message in accordance with the military standard.