Printed Tamper Proof Polybags Bags 20x24 Pouches/Cover 52 Micron for Shipping/Pack of 3 Kg. These polybags have hot melt pressure sensitive adhesive strip for easy and permanent closure, once sealed properly these bags cannot be opened and has to be torn. This tamper evident seal will ensure safety of the inner content.made from ldpe / lldpe co-extruded multilayer film makes it easy to write with regular ball point pen or permanent marker