DUAL SECURITY TRANSPORTER® BAGS IS A UNIQUELY PATENTED, HIGH QUALITY TAMPER-EVIDENT SECURITY BAG, FEATURING OUR DETACHABLE DOUBLE POCKETS,WITH A BUILT-IN 3 SERIES-SEQUENTIAL TRACKING NUMBER SYSTEM WITH TWO DETACHABLE TEAR-OFF RECEIPTS. ONE PERMANENT ADHESIVE STRIP FOR PERMANENT CLOSURE. STOCK IMPRINTED WITH BLACK AND WRITABLE WHITE FOR WRITING DIRECTLY ONTO THE SECURITY BAG. AVAILABLE IN 3.0 MIL THICKNESS IN CLEAR POLYETHYLENE.