• Pack of 100, 12" x 16" tamper evident security bags with self sealing, permanent enclosure
• Level 4 security features heat and cold tamper indicating technology, folded bottom edges and sequential numbering system
• Transparent 2.5 Mil plastic, for easy identification of bag contents
• Each individual bag incorporates a unique serial number, indicated on the bag, as well as the perforated top
• Large, non-smear writing block on bag & perforated top for labeling