Deliver priority forms in envelopes you can count on: Quality Park Recycled Open End Clasp Envelopes. Protected by durable paper and secured by metal clasps, the contents will arrive safe and sound. As an added benefit, the brown, open-end kraft construction withholds personal data and is 100% recycled. Once acquired, recipients can easily reuse the clasps to transport and store the documents over and over again. Envelope/Mailer Type: Catalog/Booklet; Envelope Size: 10 x 13; Closure: Clasp/Gummed; Trade Size: #97.