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Open End Tyvek Mailers

Tyvek is a Spunbonded olefin manufactured by DuPont. The process produces an opaque sheet that is lightweight, yet extremely strong. Tyvek resists water, bursting and tearing. These mailers have the opening on the short dimension.
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Tyvek Catalog Kwik-Tak (9 x 12) 5400 9 x 12 Open End Envelopes, 14lb Tyvek, Bright White, 100/BX (W5400)

9 x 12, 14lb, Bright White, 100/Box

Price: $56.00
#W5410 Catalog Envelope with First Class Border 9 x 12 Open End Envelopes, 14lb Tyvek, Bright White, First Class, 100/BX

9 x 12 , Box/100

Price: $58.00