Embellish Quality Park Open Side Side Seam Booklet Envelopes with logos, labels & more. The crisp, white wove paper is available for printing to coordinate with the contents inside, whether that be a promotional booklet or shopping catalog. A classic, solid gum adhesive seals the envelopes closed & keeps everything secure until it lands in the recipient's mailbox. Seam Type: Center; Flap Type: Cheese Blade; Trade Size: #10 1/2; Security Tinted: No.