Quality Park Tamper-Indicating Mailers Made with Tyvek, #13 1/2, Flip-Stik Flap, Redi-Strip Adhesive Closure, 10 x 13, White, 100/Box (R2420)

Quality Park Survivor Tamper Evident Catalog Mailers are made with durable 14 lb DuPont Tyvek, which is strong enough to withstand the most grueling conditions. The material is puncture, tear and moisture resistantvirtually indestructible. Yet, it is still lightweight which can provide a savings on shipping costs. Each envelope has a unique tamper indicating panel that displays the word "OPENED" in red if the seal is broken. Seam Type: Center; Flap Type: Flip-Stik; Trade Size: #13 1/2; Security Tinted: No.