Interdepartmental envelopes are ruled for interdepartmental routing with five columns across. Column headings include date, deliver to, department, sent by and department. Holes allow visual acknowledgment of contents. String-and-button closure secures the envelope and its contents. Envelopes are printed on both sides and made of 28 lb. Kraft stock. 10″ x 13″ – 28lb – String/Button – Kraft – 100 / Carton – Kraft