These are 10pcs very well made fountain pen ink supply container cartridges. Get them at a time! Choose them directly from manufacturer in China to get the best performance pens at an incredible low price! They are very suitable for office workers or your school boys/girls. Description: Condition: Brand newMaterial: PlasticCartridges: International standardJoining size: 4mmTotal Length(approx.): 66mm (2.6 inch)What you see on the picture is what you will getQuantity: 10PCS