6" x 9" clasp envelopes are great for storing or mailing documents. Whatever your home or office needs are, clasp envelopes make staying organized easier. They are perfect for projects, filing and mailing. Double-prong clasp and reinforced eyelet are durable enough for repeated use. 28 lb. brown Kraft stock is great for extensive handling and mailing. Contents are protected during use to give you assurance they arrive unharmed. 6" x 9" size is perfect for small documents that need to remain unfolded. Heavy gumming keeps envelopes securely and permanently sealed when needed.