This pack of 5 steel #6 Noodler's nibs contains: 2 untipped non-flex nibs 2 untipped flex nibs 1 Ahab/Konrad non flex nib The non-tipped nibs are intended to be used with slow, deliberate strokes. Using them as you would use a standard iridium-tipped nib could result in scratchiness with unreliable ink flow.