This is a rollerball pen (cap type) from the "Newton" series by rOtring, a particularly rare model from the older series. It was only manufactured for a short period, making it a highly sought-after model among collectors. The pen is made of brass with a silver coating, giving it a cool, smooth texture. The hexagonal barrel, synonymous with rOtring, is easy to grip and prevents the pen from rolling. I purchased and used this pen at a stationery store before it was discontinued, and have since stored it. Therefore, there is some wear and tear, and some paint chipping from removing the cap, but there are no functional issues. Please check the images. Please note that the original box and rollerball refill are not included. The pen is compatible with Parker-type (G2 standard) refills. You can use G2 standard compatible refills (ballpoint pens, gel ink, etc.) from many manufacturers, including Parker, Mitsubishi Pencil (Jetstream), and Zebra, as well as the original refills. Please customize it to your preferred writing feel.