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Columbian tyvek expansion envelopes
Horizontal, file-style expansion mailer makes material packing and removal easy. Durable Tyvek construction is substantially stronger and significantly lighter than paper. Grip-Seal flap produces a secure, moisture-free seal. Envelope Size: 16 x 12; Global Product Type: Envelopes/Mailers; Envelope/Mailer Type: Special Case; Closure: Self-Adhesive.
