Portable Fountain Pen-Copper The body of the YStudio desk fountain pen is made of copper. It was turned from a single piece of copper. It comes with one maple pen case in black color. The color of copper would be changed by different users and various environments yet this is also its unique feature. The oxide is harmless. It would restore its original luster by wiping with Brass Polish. Without any surface treatment, we hope each product can maintain its individual marks by the constant use of the owner. The pen writes steady and smooth. Fountain nib is from Germany Schmidt and it comes with a Schmidt converter inside. It's a true eye-catcher and a great gift suggestion. This also comes with an exquisite paper box package. Material: Pen: Copper, Pen case: black maple Dimension: 10.5 x 12 x 138 mm Weight: 49g Box: 115 x 185 x 50 mm Refills: A converter is included (International Standard Cartridge Type) INK RECOMMENDATION In order to have the best writing experience, the manufacturer of our fountain pen nibs, Germany Schmidt, recommends customers to use ink which has a moderate thickness. For example, the ink from Pelikan, Waterman, Cross, etc.