This 5 pack of steel #6 Noodler's nibs contains 2-untipped non-flex nibs, 2-untipped flex nibs and 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.