SIDE SEAMED GUMMED FLAP CONSTRUCTION: Quality Park's business envelopes have a moisture activated GUMMED seal allowing you to send your invoices, statements and business mailing with confidence and professionalism. 24 LB WHITE WOVE STOCK: Manufactured from premium 24 lb stock, the white wove paper is ideal for everyday business use. Quality Park's 24 lb. White Wove stock creates a professional touch to your personal and business mailing. 500 ENVELOPES IN EACH BOX: ideal for both everyday office use and bulk mailings, each box of Quality Park #6-3/4 Remittance Business Envelopes provides a long lasting supply! Country of origin: United States