The next time your office needs to package a shipment, opt for Quality Park ClearClasp Postage Saving Envelopes. They’re designed to help save money at the post office. The ClearClasp® components dodge the extra charge that’s typically associated with metal clasps. And with a smooth kraft surface, there’s plenty of space to add processing labels. Envelope/Mailer Type: Catalog/Booklet; Envelope Size: 6 x 9; Closure: Redi-Tac; Trade Size: #55. Specifications