Quality Park 10 x 13 Treated Inter-Departmental Envelopes

Inter-department - #13 1/2 - 10" Width x 13" Length - 28 lb - String/Button - White - 100 / Box. Material that inhibits the growth of mold and mildew to protect contents; made from heavyweight, 28 lb. white stock for optimal durability. Perfect to route messages throughout the office.