Broad writing nib (0.95 mm) for a broad line. The nib is inserted in a black plastic ferrule. In order to separate the ferrule from the nib gently pull the two parts in the opposite directions. For a proper cleaning, soak the nib in warm water. When using this nib, avoid using thin paper, as the larger ink flow could leek through to the sheets underneath. Plastic nib and Iridium tip material.