Universal Deluxe Tyvek Expansion Envelopes, #13 1/2, Square Flap, Self-Adhesive Closure, 10 x 13, White, 100/Box - White / #13 1/2
Ideal for mailing bulky items and materials. Excellent alternative to heavy boxes and cartons. Superior water-, chemical-, moisture-, burst-, tear- and puncture-resistant protection. Open End. Seam Type: Center; Flap Type: Square; Trade Size: #13 1/2; Security Tinted: No.