Quality Park Catalog Envelopes, Redi-Seal, Brown Kraft, 10 x 15, 250 per Box, (43862) SECURE: Redi-Seal closure will ensure your contents stay safe with the licking factor out of mind DURABLE: Made from 28 lb. brown kraft paper EASE: Open-end construction allows for easy insertion of documents and printing PERMANENT SEAL: Special coating provides a secure and permanent seal FEATURES: 250 Brown Kraft, 10 x 15 Catalog Envelopes