Brightly colored envelopes offer a ruled format for interdepartmental routing on one side with space for 31 entries. Ideal for color-coding inter-company mail or to signal special handling. Holes allow visual acknowledgment of contents. Inter-department Envelope design features a string-and-button closure and standard style with five columns: Date, Deliver To, Department, Sent By and Department. Envelopes are made of 28 lb. stock.