The transparent adress labels L7560-25 for laser printers in 63.5 x 38.1 mm format are perfect for labelling C6 envelopes. One pack includes 525 mailing labels across 25 sheets. The polyester film labels are oil, dirt and temperature resistant (-20 °C to +80 °C) as well as waterproof. The transparent address labels virtually disappear when applied, for that printed-on look. Ideal for light coloured envelopes. You can rely on jam-free printing with no adhesive residue left in the printer.