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New tamper proof advantage tyvek® security envelo...
Tamper Proof Advantage Tyvek Security Envelopes, 100/Box, 9 x 12, White (QUAR2400)
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.