Quality Park No. 10 Single Window Envelope with a Self-Seal Closure

Single Window - #10 - 4 1/8" Width x 9 1/2" Length - 24 lb - Self-sealing - White - Wove - 500 / Box. Left-side window eliminates the need to address the envelope separately, saving time and effort; positioned to fit most invoice address layouts. Contemporary side seam for a modern, professional look; easy insertion ideal for bulk mailing applications.