100-Box Pack of White #15 1-2 Square Flap Self-Adhesive Closure Deluxe Tyvek Expansion Envelopes Measuring 12 X 16

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: #15 1/2; Security Tinted: No.