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Mail Processing and Automatic Insertion

DuPont™ Tyvek® envelopes are insertable on most common commercial equipment with best inserting performance provided by 18 lb. stock. The envelopes used must meet the following inserting equipment manufacturers’ design requirements, such as:

Flap dimensions and taper
Throat design
Enclosure size
Overall envelope dimensions
Open side or "booklet" style
Remoistenable gum