Quality Park 6" x 9" clasp envelopes are a necessary staple for filing, storing or mailing documents at home or in the office. Metal clasps let you open and reseal the projects you'll need access to frequently. A deeply gummed flap with moisture-activated adhesive keeps your catalog envelope ready to mail with a secure, aggressive seal. Made of heavyweight 28 lb kraft paper. These classic manila envelopes are the workhorse of the office—opaque to keep private contents concealed for all your interoffice memos and business mail. These no frills mailers still make cost-effective and sturdy shipping envelopes. Or use yellow envelopes as a quick way to sort and organize paper. A bulk dispenser box keeps our small envelopes on hand for transcripts and administrative records, business mailings, home office organization, home school uses, or as a replacement greeting card envelope for 6 x 8 greeting cards. 500 Per carton.