2500#10 Custom Printed Single Left Window Self Seal Security Envelopes Letter Size, Text and Logo Customization, Self Sealing Closure, Security.

[Single Window #10 Self-Seal Envelopes] These premium security #10 envelopes offer high-quality, ultra-secure protection for daily business and legal mail, safeguarding confidential contents and information. Avoid flimsy, thin large envelopes that let contents show through. [Ultra-Strong Self-Seal Closure] These #10 mailing envelopes feature a robust self-seal adhesive strip, forming a durable seal across the envelope width that resists tearing, ideal for mailing bulkier, thicker documents. [Easy-Read Single Window] These white self-seal #10 business envelopes are excellent for bulk mailing. Each envelope includes a premium, extra-large, easy-to-view 4-1/2' X 1-1/8' poly window, placed 7/8' from the left and 1/2' from the bottom, perfect for clearly showing addresses or business details, eliminating slow printing and handwritten addressing. [Security Tint Pattern] These plain white letter-size envelopes are crafted with an interior security wave pattern to shield contents, data, and numbers from being easily seen, unlike inferior cheap envelopes. [Convenient Supply] These peel-and-seal letter envelopes are great for everyday home use. Each box contains 250 envelopes for an extended supply. Each security peel-and-seal envelope measures 4 18' X 9 12', perfect for invoices, statements, and numerous other business applications!