Quality Park catalog mailing envelopes are perfect for shipping, storing or organizing. Heavyweight 28 lb. kraft paper withstands extensive handling at home, in the office or on the mail route. This classic open end envelope stores letter-size papers and photographs flat or larger items folded. Our large envelopes are perfect for workbooks, manuscripts, booklets, sales literature, certificates, contracts or other large or heavy enclosures. A wide, heavily gummed commercial flap seals tight with moisture to keep bulky inserts secure. Center seams give added strength for heavy contents. Store your Quality Park gummed catalog envelopes in a cool, dry place for impressive longevity. Get stock-up quantities of this never-out envelope essential!