Advantage Flap Stik Tyvek Mailer, 9 x 12, White, 100/Box

Durable, lightweight Tyvek® mailer is moisture and rip resistant. Tamper Indicating Panel (TIP) flap displays the word “OPENED” in bold red letters if seal is broken. Flap-Stik® self-adhesive closure provides a secure seal. Envelope Size: 9 x 12; Envelope/Mailer Type: Mailer; Closure: Self-Adhesive; Trade Size: #90.