Whether you’re delivering documents between departments or transferring assets from one building to the next, Quality Park String & Button Inter-Department Envelopes are an excellentchoice to have on hand. Preprinted labeling allows you to record the date, time and other notes before passing materials off to someone else. Envelope/Mailer Type: Interoffice; Envelope Size: 9 x 12; Closure: String & Button; Trade Size: #90. Specifications