Description The Adcock Sheffield Series No. 400 dip pen nib has a long rectangle shaped breather hole. This is a vintage nib and may have some minor surface rust which can be removed and does not impact performance. Dip pen nibs are sold separately from a nib holder, which is usually called a dip pen. We offer Free Shipping on all orders over $59 for US customers, and for orders over $250 for our Canadian customers.