Lanxivi Twins Dragon Playing Pear Ancient Black Fountain Pen Red Jewerly Nib Size : 18KGP M , Cap : Screw Type Capped length 143mm , Diameter 15mm & pen weight 100g Take Cartridge : International standard ( ASIN : B00W01VCJA ) Package : One pen & 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 !