SupremeX Outside Side Seam High Efficiency Envelopes - #10 - Window - 4-1/8" x 9-1/2" - Box of 500

Designed for high-volume mailing environments- these SupremeX Outside Side Seam High Efficiency Envelopes feature a #10 size with a window- measuring 4-1/8" x 9-1/2" for standard business correspondence. The outside side seam construction provides added durability and smooth performance in automated inserting and mailing equipment. Ideal for invoices- statements- and transactional mail- these white envelopes deliver efficiency- consistency- and professional presentation. Box of 500.