The Two-tone Iridium bent nib is curved for fude calligraphy . You can write from fine to thick broad by varying the writing angle. Some customers also call this as italic calligraphy fountain pen. | Capped length 138mm , Posted length 155mm , Diameter 11mm & pen weight 35g | Take Cartridge : International standard , ink cartridges are not included for safety , you may refer to the matching cartridges at http://www.amazon.com/dp/B00W01VCJA | Package : One pen , one pen pouch & one removable converter (work with all bottle ink ) | 100% Satisfaction Guarantee : If there is any reason you do not like the pen ,just send us a message ,we can offer you a full refund or replacement !