Large-format envelopes function as an wonderful, low-cost storage, protection, labeling and mailing solution for sensitive documents, photos, manuscripts and more. Brass clasp and gummed flap keep contents secure at home, in the office or through the mail system. Extra heavy-duty, opaque 32-pound Kraft construction provides excellent rip- and tear-resistance. Made with materials derived from SFI-certified forests. Envelope Size: 10 x 13; Envelope/Mailer Type: Catalog/Clasp; Closure: Clasp/Gummed Flap; Trade Size: #97.