Writing smoothly with the uninterrupted ink flow, 1mm consistency line, make your writing expressive and effortless, perfect for long time writing. Just the right weight makes it perfectly balanced for your hand, deliver an incomparable writing experience. The contrasting color combination is very classy and elegant, bringing a touch of vitality and happiness to your daily routine. Ink cartridges not included. Each pen has a piston converter, which allows you to refill with your own ink. The pen is also fit for 3.4mm bore diameter ink cartridges, you can purchase them separately. Best gift idea for graduation, teacher, student, writer, or simply as a present to treat yourself. Just the right weight provides a good balance, it allows you to write effortlessly and provides a great writing experience. The fine nib keeps your line consistent, ink flow smoothly without interruption for long time writing, the cap go on and off smoothly. It's a perfect writing tool for your daily use. And it is designed for both left-handed and right-handed, you can also write smoothly if you are lefty. No ink or ink cartridges included in this set. If you want to use ink cartridge. Weight: 32.8g Material: metal Size: 13.7 cm long, 1 cm wide Color includes: yellow, gray, green, blue, black, brown-red, red, dark brown Package includes: 1pc * pen