Survivor® 12 x 16 x 4 DuPont Tyvek Expansion Mailers with Redi-Strip® Closure

Expansion - 12" Width x 16" Length - 4" Gusset - 18 lb - Peel & Seal - White - Tyvek - 50 / Carton. Made with durable yet lightweight, 18 lb. DuPont Tyvek that's tough enough to resist punctures, tears, moisture and chemicals for long-lasting performance. Gusseted sides that expand up to 4" to accommodate bulky items.