Esterbrook Fountain Pen Nibs look at 9 of the 33 they made

Esterbrook had a replaceable nib. Fit all their models. You could buy separately. A unique feature Esterbrook had.

Nib Description Pen Model Ink

2550 Extra Fine Medium (Bookkeeping) Black Aerometric Noodlers Bullet Proof Black
9556 Fine Writing Red J Sheaffer Red
2556 Firm Fine - general Writing Black SJ Noodlers Bullet Proof Black

1551 Firm Medium (Student) Aqua Purse Pen iroshizuku ama iro

9314M M Medium Stub Copper J Callifolio Inca Sol
2314B Relief Broad Oblique Blue SJ Noodler’s Legal Lapis

2968 Firm Broad Grey SJ Rohrer-Klinger Scabiosa Iron-gall nut ink
9968 Firm Broad script Red LJ Noodler’s Apache Sunset

9128 Extra Fine Flexible Green J J. Herbin Vert Empire