Quality Park 12 1/2" x 15 1/2" 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 for drawings, posters, art prints and more. Or use yellow envelopes as a quick way to sort and organize work that won't fit a standard file drawer. Our large envelope is ideal for any oversized papers you prefer to store flat without creases. Endlessly useful for shipping, home office organization or home school and classroom storage. 100 Per box.