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Looking for a sturdy and dependable mailing envelope for your next project? Try our Tyvek Flat Catalog Mailing Envelope! Measuring 10 x 13 inches with a thickness of 14 lb paper, this envelope is perfect for sending bulky documents, brochures, and catalogs with ease. Its durable construction ensures that your contents will arrive safely and securely at their destination. With its self-sealing closure and clear display window, it's quick and easy to prepare and send out your mailers. Use it for promoting products or services, sending out invoices or bills, or as a mailer envelope for your e-commerce business. Get yours today and experience the convenience of reliable shipping!