Meets new US Postal Service regulations for folded self mailers 1" Round can be hand applied or by machine ProLabel brand wafer seals - 5000 labels per roll 7" outer dimension, 3" core Clear frosted translucent paper wafer tab mailing seals for folded self mailers under 1 oz ProLabel brand 1" round clear frosted translucent mailing seals to meet new postal regulations for sealing folded self mailers under 1 oz. The postal service announced that to improve the productivity of processing booklets and to decrease damage to mailpieces, the new standards require that booklets have no perforations. Tabs with perforations are easily broken, do not maintain their integrity, and are damaged in transport prior to entering the mailstream. Therefore, only solid tabs made of plastic, vinyl, translucent paper, opaque paper, or cellophane tape will be acceptable. Great for folded self mailer postal mailings! These seals become almost clear when applied to a mailing piece.