Quality Park Dupont Tyvek Jumbo Heavyweight Envelopes, 18"W x 23"H, White, 25/Pack

The dupont tyvek lumbo envelopes ensure safe storage and transportation of important documents. durable construction resists rips and tears withstands moisture and chemicals perfect solution for sending or storing large items won't abrade or chemically affect contents lightweight envelopes save on postage clean, bright white professional image self-seal flap-stik closure ideal for negatives, artboards and blueprints includes 25 envelopes per box.