Width Of Stroke Is 6 Mm Refillable. By Using Pilot Parallel Pen, With Two Ink Cartridge, You Can Achieve Beautiful Gradated Lettering. It Can Effectively Be Used For Drawings, Calligraphy Illustrations, Name Cards, Menus, Gift Cards, Labels, Signatures & Musical Notations Etc Style, Beauty & Originality All At Your Figure Tips. Master The Techniques Of Pilot Parallel Pen & You Will Always Be Able To Express Yourself Creatively. The Pilot Parallel Pen Features Two Parallel Plates On The Nib Point For Beautiful, Sharper Lines