Description: These piston brush pens allow you to store large ink, you won't have to worry about it running out for a long time. The transparent body make this pen looks beautiful and energetic , so you can see the ink slosh around in the barrel. The hair is soft, , and provide precise control. You can write fine to large broad line with it . The piston filling mechanism is easily operated ,no need for cartridges or a converter! Compact and practical,easy to carry,beginners,professionals can use,can be used for irrigation ,used for writing, painting, hook line, comics, art and design. Specification: Material: Plastic, Hair Total Length: 21.5-22cm/8.27-8.3inch,Hair: 0.9x3cm/0.35x1.18inch Package Includes: 6 Pieces Calligraphy Chinese Brush Pens Note: Please allow a little size error due to manual measurement. Please be reminded that due to lighting effects and monitor's brightness/contrast settings etc, the item's color may be slightly different from the pictures. Please understand.