These round clear frosted translucent mailing wafer seals are ideal for mailing anything from retail packages to postal mailings. These wafer seals have a black mark on the back of the liner, to ensure quick and easy hand OR machine application. Whether a small business or a large company with automated assembly line, these seals are ready for your application. Adhesion is easy and uses a standard permanent adhesive. These seals are compliant with new postal regulations for sealing folded self-mailers under 1 ounce. They are solid translucent label tabs with no perforations to allow premature breakage.