Universal 19003 Tyvek Expansion Envelope, 10 x 13, White (Box of 100)

100 Deluxe Expansion #13 Tyvek Envelopes, Envelope Size: 10" x 13", Sturdy Tyvek material resists moisture, punctures and tears, This lightweight envelope helps reduce shipping costs, excellent alternative to heavy boxes, Square Flap, Self-Adhesive Closure