Kaweco Rollerball refill.
Inside the G2 box there is 1 refill of 0.7 mm, available in black and blue (see options).
The gentle fluid gel-ink keeps up with every writing speed.
Hoeked has a large collection of Kaweco pens. You find them all together under designlabel Kaweco.
Specifications:
System: refill for rollerball
Color: black, blue
Inside: 1 piece