Durable envelopes stand up to everyday use Ideal for multipurpose mail and file storage. Wide seams offer added strength. Fully gummed flap provides a strong, dependable seal. Long-life metal clasp and reinforced eyelet withstand repeated use. Columbian(R) Clasp Envelopes, 6in. x 9in., 28-Lb, Brown Kraft, Box Of 100 is one of many Catalog Envelopes available through Office Depot. Made by Columbian.