Nib: Steel Font width: FlexF. The camel, dark brown, and black marble interweave to create a profound luminance. With a classic enamel trim. The large steel nib is stable and stable. The large steel nib provides a stable writing feel and is suitable for those with high writing pressure. The Flex F nib does not have an extended nib and is softer to the touch. The vacuum inhalation mechanism is activated by repeatedly pressing the push-button on the barrel while the nib is dipped into the ink bottle up to the neck axis. The vacuum inhalation mechanism is activated by repeatedly pressing the push button on the barrel. The vacuum inhalation system is an innovative inhalation mechanism that fills the barrel with ink by repeatedly pressing the push button on the barrel. The push button can be operated with one hand. The character width is thicker than the same character width of Japanese domestic fountain pens. F=Japanese medium fine to medium. There is an individual difference in the pattern. 14.1cm with cap attached / body only approx. Maximum diameter of the barrel:? 14.0mm. Thank you for your understanding.