Medical Hidden Health Condition Metal Implant Alert Luggage/Bag ID Card. These cards are designed to alert security officers that you have a surgical metal implant that may trigger the metal detector alarm when you pass through your security screening. They are not essential but can be a helpful aid when at airport security etc. Our PVC cards are printed from our quality re- transfer printer and have a high gloss overlay making them durable and hard wearing. Comes with a clear plastic bag loops to easily attach to bags or luggage. 152mm loop. Dispatched with Royal Mail first class within 1-2 business working days.