Jinhao X450 Fountain Pen GOLD and Green Marble Length : 138 mm ; Nib : 18KGP Medium ; Converter Screw type ; Cap : Push-Type , Pen Weight : 45G It comes with a converter to work with bottle ink ,it also works with standard cartridge ,add matching cartridge : www.amazon.com/dp/B00W01VCJA Package : 1 x Pen and 1 x refillable converter Please note that you will not see the green color clearly until you look it in the nature light 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 !