OEM Quality Park Standard Style Inter-Department Envelope, available in a box of 100. These brightly colored envelopes feature a ruled format for interdepartmental routing on one side, accommodating up to 31 entries. Ideal for color-coding inter-company mail or signaling special handling, the envelopes include holes for visual acknowledgment of contents. Designed with a string-and-button closure, they are made from durable 28 lb. stock.