• Pack of 100, 19" x 24" 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 & barcode, indicated on the bag, as well as the perforated top
• Non-smear writing block on bag & perforated top for labeling