Our Blue Tamper Evident Void Security Labels delaminate irreversibly on removal, leaving a highly visible OPEN VOID message & unique identification number on application surface. Labels measure 150x50mm and are supplied on a continuous 50m linerless rolls with a perforation between every 150mm label. Numbering sequence is continuous with a pre-determined unique number sequence printed in black. Ideal for use to seal apertures, cabinets, cardboard, plastic packaging, shrink-wrap, pallet-wrap and much more!