Quality Park Standard Style Inter-Department Envelopes are brightly colored and designed for efficient interdepartmental routing. Each envelope features a ruled format on one side with space for 31 entries, making it ideal for color-coding inter-company mail or signaling special handling. The envelopes include holes for visual acknowledgment of contents and a string-and-button closure for secure handling. Made of durable 28 lb. stock, these envelopes are perfect for office use.