The Uline S-209 4.5" x 5.5" Invoice Enclosed ClearEnvelope is a high-quality product designed for business and industrial use. With an approximate unit quantity of approximately 950, this envelope is perfect for packing and shipping purposes. The clear design allows for easy visibility of the contents, while the invoice enclosed feature adds a professional touch to your shipping needs. Made by the trusted brand Uline, this product is reliable and efficient for all your packaging requirements.