The RFID Hanging Tag construction is much thicker than the two other Metalcraft RFID tags. The top and bottom substrate will vary according to the application. The top substrate is laminated to the base substrate ranging in thickness from .002" to .010". This is Ideal for tagging items like process control instruments and other equipment either out in the field or on the inventory shelf. This will eliminate documentation tasks by storing all pertinent calibration data in a relational database with a handheld reader and taking the guess work out of what calibration values or when maintenance will be done. This will get you to "the state of the art" of things. And eliminate the old way that cost many manhours just to achieve. This will also help you find what your looking for in case the need arises.