Security and sealing label for printing thermal transfer printers. After application, the label cannot be removed without the label being layered. The text "VOID" or a grid appears and indicates the removal / opening attempt. Excellent for sealing packaging, valuables and sealing of goods prone to theft. Silver matt UL approved polyester MT303, for printing in label printers. Core 38 mm. 3-row. Roll over 6000 pieces.