OEM Quality Park Redi Strip Expansion Envelopes, available in a pack of 25. These envelopes feature a 2" expansion gusset, providing security for bulky mailings such as 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 from durable 40 lb. Kraft material, these envelopes are designed for reliable use.