Duke Bamboo Fountain Pen Confucius Commemoration Pattern Rare Collection Nib Size : Iridum M Capped length 145mm , Posted length 175mm , Diameter 16mm & pen weight 60g Take Cartridge : International standard ,Ink cartridges are not included for safety , you may refer to the matching cartridges at ASIN B00W01VCJA Ink cartridge : international standard ( Fit ASIN B00W01VCJA ) 100% Satisfaction Guaranteed : 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 !