For (color) laser printers and copiers. Ideal for sealing equipment, file carriers and products. When one attempts to remove the seal, a previously invisible pattern appears and remains on the surface. Tear-resistant and resistant to water, dirt, UV and temperatures between -20°C and +80°C. Over a hundred templates available for this product when using our free online software. Box of 20 sheets, ft 21 x 29.7 cm (A4). Easy to design and print thanks to the free Avery Design & Print software.