Deluxe Tyvek Expansion Envelopes, Square Flap, Self-adhesive Closure, 12 X 16, White, 50-carton

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 Side. Seam Type: Weld; Flap Type: Square; Trade Size: #15 1/2; Security Tinted: No.