Feature(may vary by option.)

●ROtring was born in 1928 in Germany at a time when the art and architecture was reflected deeply in Bauhaus Design School in Germany. Based on the belief that "precise lines are beautiful" and the philosophy of "art in the industry" by Bauhouses, we have worked a number of products that are minimalistic, yet high performance. The process of creating ideas that creators and engineers have gone through the same time as the times change. And when inspiration comes out, you can visualize your shipment and expand your imagination infinitely rOtring follows this process and continues to support the creation of professionals
●Drafting Pen Rapid Graphs feature a "Double Heroics (Double Air Pressure Adjustment Channel) mechanism to prevent ink overflow
●Every time you change the cartridge, the ink adjustment part is replaced with a capillary (capillary fluid system) cartridge, so no maintenance is required
●The drawing pen rapid graph is designed to minimize air and ink contact surface, and the high concentration of ultra-fine particulate pigment ink does not clog up easily
●0.1 0.13 0.18 0.2 0.25 0.3 0.35 0.4 0.5 0.6 0.7 0.8mm Drawing Pen

[0.8ｍｍ]

[0.1mm]

[0.2ｍｍ]

[0.5ｍｍ]

[0.3mm]

Description

Features a double heroic mechanism to prevent ink overflow.
Maintenance free capillary (capillary fluid system) cartridge system that allows you to replace the cartridge every time. Uses high-concentration ultra-fine pigment ink (capillary cartridge).
Capillary Cartridge Type
Paper
Uses capillary cartridge ink
Shaft Diameter: 0.5 inches (12 mm); Total Length: 5.3 inches (133 mm); Weight: 0.5 oz (15 g).

(From Amazon.co.jp)