HIGH QUALITY, TAMPER-EVIDENT SECURITY BAGS. ONE PERMANENT ADHESIVE STRIP FOR PERMANENT CLOSURE. STOCK IMPRINTED WITH BLACK AND WRITABLE WHITE FOR WRITING DIRECTLY ONTO THE SECURITY BAG. DUAL SEQUENTIAL TRACKING NUMBER SYSTEM WITH BUILT-IN DETACHABLE TEAR-OFF RECEIPT. AVAILABLE IN 2.75 MIL THICKNESS IN WHITE/GRAY COEXTRUDED POLYETHYLENE.