The Security Seals supplied by MML Limited are made from Polypropylene. This versatile pull-tight seal features heat staking technology to ensure the metal spring insert to the body and provides clear evidence of tampering if forced open or cut. Recommended applications include airline in-flight duty free or Catering Trolleys, Baggage, Refineries, Fuel and Oil Tankers, Chemical Drums, ATM Dispensers, (Bank) cash/Coin Boxes, Cash Bags, Gaming Machines, Postbags, Fire doors and Lockers. They can be barcoded and branded as per customer specifications.