1.4 size available (A1,A2,A3,A4) 2.Choose from 3 or 4-ring metal clips. 3.Holding paper or drawings securely and tidily. 1.4 size available (A1,A2,A3,A4)2.Choose from 3 or 4-ring metal clips.3.Holding paper or drawings securely and tidily.4.Choose with or witout sheet protectors.5.Easy for carrying, available with shoulder strap and durable handle. RING BINDER PORTFOLIO