The WSID-01 is our original "Worker Emergency ID". It is easily fitted to the exterior of each workers hard hat. Securely stores their critical and potentially lifesaving ID information essential in the event of a serious accident or medical emergency. The LATEST VERSION of our WSID-01 features new "Emergency Design" that utilizes the internationally recognized "Star of Life" medical symbol. The waterproof ID card has also been improved to increase the amount of information stored to further strengthen the function of this Hard Hat ID in use. Our "Worker Safety" Hard Hat ID (WSID-01) is very versatile and can also be fitted to clothing and other work equipment such as a harness, reflective vest etc. It is very durable and can withstand extended use in extremes of heat and cold. This worker safety product is a perfect solution to assist in the essential work of pro-active health & safety officers in all helmet wearing industries such as construction, oil & gas, mining, heavy industry, railways and utilities. Specification:, Dimensions: 70mm x 15mm (approx. 2.75" x 0.5"), Weight: Less than 5 grams, Reflective: Features 3M Scotchlite Reflective Material, 100% Waterproof, Secure - Keeps important information safe, Helmet Safe Adhesives used, Cost Effective - A low cost safety solution