The InexPens 2.5mm Stub Nib is an extremely smooth size #5 replacement nib. It's made of steel and delivers a great writing experience.
The Best Black Pens
Handmade 2.5mm stub nib, Popular size #5 replacement nibs, Stainless steel, Calligraphy fountain pen nibs, Smooth writing experience, Custom stub
2.5mm Stub Nib
TWSBI Vac 700 Fountain Pen – Handwritten Review – – Fountain Pen, Ink, and Stationery Reviews
Luxury quality 990 Transparent white 0.38/0.5/0.7/1.1/1.5/1.9/2.5/2.9mm Fountain Pen School office stationery ink Art pens
Pen Reviews – stationeryramblings
Luxury quality 990 Transparent white 0.38/0.5/0.7/1.1/1.5/1.9/2.5/2.9mm Fountain Pen School office stationery ink Art pens
Pen Reviews – stationeryramblings
Tools: Favorite Fountain Pens
The Best Black Pens
Pelikan M1000 O3B Writing Sample - Of Nibs & Tines - The Fountain Pen Network
Help pinning-down vintage italic nib widths : r/fountainpens