Priority Mail Flat Rate® Envelope - EP14F | USPS.com
https://store.usps.com/store/product/shipping-supplies/priority-mail-flat-rate-envelope-ep14f-P_EP_14_F
WEBThe Priority Mail Flat Rate® Envelope - EP14F is quick, easy, and convenient, simplifying your Priority Mail® shipping process for documents. Just like the Flat Rate Boxes, this paperboard envelope features a predetermined flat rate regardless of the weight or destination zone of the package.
DA: 23 PA: 10 MOZ Rank: 83