#6 Steel & Gold Nib Iridium Point. Will fit the #6 feed and the #6 housing.
All of the nibs featured will fit most kit pens, and many production pens.
#5 nibs will work with the smaller kit pens, such as the Aristocrat, Graduate, Jr Gentlemen, Baron, etc.
#6 nibs will work with the larger kit pens, such as the Gentlemen, Majestic, etc.
If you are unsure which you have, a #5 nib will have a feed that is 5mm wide. A #6 nib will have a feed that is 6mm wide. Our feed dimensions are listed for your review which should help you make the right choice.