Tyvek Expansion Mailer, 12 x 16 x 4, White, 18lb, 50/Carton
Featherweight, moisture- and rip-resistant Tyvek® mailer delivers heavyweight protection. Expandable design is ideal for shipping bulky contents like books, binders and reports. Flap-Stik® closure provides a secure, peel-and-press seal. Envelope Size: 12 x 16; Envelope/Mailer Type: Expansion Mailer; Closure: Self-Adhesive.