Survivor Light 14 lb Tyvek Open End Expansion Mailers, First Class, #13 1/2, Square Flap, Redi-Strip Closure, 10 x 13, White, 100/CT (R4620)

Expandable mailer made with DuPont Tyvek material delivers the best possible protection at a shipping-cost-saving weight. Inserting and removing contents is easy because of its horizontal, open side orientation. Self-adhesive Redi-Strip closure provides a secure, peel-and-press seal. Clean, crisp look makes a professional impression. USPS First Class MailLightweight 14 lb Tyvek. Seam Type: Center; Flap Type: Square; Trade Size: #13 1/2; Security Tinted: No.