About this item Clasp envelopes are heavy-duty materials that are ideal for securing important documents during transit or storage, ensuring strength and durability. Envelopes feature both a clasp and gummed closure, providing double protection, its clasp offers reusable sealing, while the gummed flap ensures a tamper-evident seal. Catalog envelopes measure 6″ by 9″, perfect for a variety of documents, and suitable for mailing letters, and other important paperwork. Clasp envelopes’ brown kraft color gives a professional and classic look, suitable for business and formal correspondence. Envelopes are sold in packs of 50, ideal for businesses, educational institutions, and offices requiring reliable mailing solutions.