Fuliwen Fountain Pen Set with Ink Refills Converter , Fine Nib Writing Pen ( Black ) Nib : Fine Nib ( about 0.5 mm ) , Cap : Push Type Ink: International Standard , you can purchase cartridges by us at ASIN B01FJAAEUQ Length(Approx): 138mm ; Weight(Approx): 38 g ; Diameter:13mm Package : One pen with ink converter for bottled ink and a small soft cloth from Erofa for cleaning pens 100% Mondy Back Guarantee :If you are not satisfied with this purchase , just send us a message ,we will either refund you or send your replacement