Jinhao Deluxe Golden Double Dragon Fountain Pen with Ink Refills Converter The Fountain Pen Nib : 18 KGP Medium nib ( about 0.7 mm ) , the 18 kgp nib delivers a smooth handwriting experience . Length(Approx): 140 mm ; Weight (Approx) : 110 g ; Diameter (Approx) : 15 mm , Cap : Screw Type . Ink : work with bottle ink and international standard cartridges . To add matching cartridge , visit: https://www.amazon.com/dp/B01FJAAEUQ Package : 1 x fountain pen and 1 x refills converter for bottle ink . Unmatched Quality : We use high quality material and make the pens elaborately ,every parts had been examined strictly.