The line thickness of the fibre needles depends on the tip design. As a consequence, there are types, especially among the fibre gratings, whose line thickness is not a fixed value due to their cut tip, but falls within an interval. In the case of conical and needle-tipped pens, on the other hand, the line thickness is fixed.

A green product that is manufactured with lower energy consumption, reduced emissions of harmful substances, less waste generation, less chemical usage, or reduced packaging material usage.

The product contains recycled material.