These are fine bolt action pen ink refills/cartridges for Bastion pens. These pen refills have a fine-tip precision point that puts out crisp, solid lines with a smooth feel. Our ink cartridge are fine tip and available in the following colors and ink styles: Standard ink - Black, Blue Gel ink - Black, Blue Our cartridge description is expressed as a particular type of Parker refill, which is the G2 ISO 98mm length, 5.8mm width, fine tip (.05 mm) version. The shape must match the original version shown in our product image. Parker is changing the style on some that they still describe as G2 ISO with a wider body that continues all the way down virtually to the point. Our pens require the 'classic' Parker G2 style with the tapered end toward the point.