This is a Sarasa Select refill in an extra fine 0.5 size. Customize your Sarasa Select pen by selecting pen refills in different colors and or sizes. Make sure to line up your refill correctly before installing.
The Sarasa Select is a multi pen that houses refills that give you the writing experience/feel of a Sarasa with the convenience of multiple colors (or a pencil) at your fingertips).
Made in Japan