"Blueline 4"" x 9"" Double Window Envelopes - 100 / Box - White"

"Make mailing easy and secure with the Blueline double window envelopes. Featuring a dual-window design, they clearly display both the sender's and recipient's addresses for added convenience. For enhanced privacy, the darkened interior includes a unique pattern that effectively prevents visibility of the document contents. | Blueline 4"" x 9"" Double Window Envelopes - 100 / Box - White"