The expensive discovery is a printed run that does not align, found after a thousand letters are folded. Check the window position against your letterhead and the fold you actually use. Self-seal saves real time over gummed flaps on volume. DLX gives clearance where a true DL runs tight through an inserter. See correspondence envelopes, DLX envelopes and pocket envelopes.

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Tudor Envelopes Mailing and Office Supplies

Shop Tudor C5, C4, DL and eco envelopes for business mail, documents, schools and offices.