Duke Black Fountain Pen Fude Pen Nib Interchangeable Calligraphy broad Pen Black Leather Pen Case Set This item comes with one normal nib fountain pen (0.5mm), one fude pen nib and one black leather pen case .You can write large thick writing ( 1.2mm ) to Medium writing ( 0.7mm ) by varying the writing angle with the fude nib . If you want to write it in fine nib ,you may write with it upside down. Some buyer also call the fude nib as a western italic fountain pen Capped length 140mm , Diameter 14mm & pen weight 35g Take Cartridge : International standard ,Ink cartridges are not included for safety , you may refer to the matching cartridges ASIN : B00W01VCJA Please kindly note the spring in the converter is for preventing ink from freezing ,not defective