Park Ridge Clasp Envelopes with Deeply Gummed Flaps are great for storing or mailing documents. Whatever your home or office needs are, clasp envelopes can make staying organized easier! Great for projects, filing and mailing, Quality Park's double prong clasp and reinforced eyelets are durable for repeated use. Envelopes are made of 28-lb brown Kraft stock with embossed ridges for a unique, sophisticated look. Contents are protected during use to give you assurance that it arrives unharmed. Perfect for small documents that need to remain flat. Seam Type: Center; Flap Type: Square; Trade Size: #90; Security Tinted: No.