Avery Mailing Seals, Clear, Permanent,Non-Perforated, 480 per Pack (5248) Ideal for sealing flyers, brochures and newsletters. Permanent adhesive ensures secure closure. Pack of 480 Removes the seals from their backing Hand write or print, compatible with both laser and inkjet printers Not recommended for use with color laser printers Keep brochures, flyers, newsletters and more securely folded while in the mail