Lanxivi Jinhao Snake Fountain Pen Vintage Black Cobra Three-dimensional Pattern Collection Pen Nib Size : 18kgp M , Cap : Screw type Ink cartridge : international standard ( Fit ASIN B00W01VCJA ) Capped length 156mm , Posted length 183 mm , Diameter 13.5mm & pen weight 90g Package : One pen with gift box & one removable converter (work with all bottle ink ) 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 !