OEM Quality Park Redi Strip Expansion Envelopes provide security for bulky mailings with a 2" expansion gusset for extra-thick items. These envelopes are ideal for computer reports, catalogs, and binders. The large end-opening allows for easy document insertion, while the convenient Redi-Strip closure requires no moisture to seal; simply peel away the liner and seal. Made of durable 40 lb. Kraft, these envelopes are designed for reliable performance.