TWSBI Swipe Prussian Blue Fountain Pen

A traditional cartridge, converter type fountain pen. 

The pen, ink cartridge, traditional converter, and a spring converter come all in one, ready for you to use right away. 

Cartridges/Converter are standard international top hole fitting

Nib size: EF, F, M, B, and Stub1.1 
Posting Cap

North America Package: Swipe pen, Spring converter, Cartridge, and additional traditional Converter. 

Rest of the World Package: Swipe pen, Spring converter, Cartridge 

This website ships the North America Package. 

A quick no brainer guide in choosing nib sizes in an overly complicated fountain pen world:

If you write small, go with an EF
For the normal writer, F is the most popular
If you tend to lean on a bigger font, M will be perfect
B is for statements!! Sign a check in B, write a header in B, do some coloring/shading in B
Stub nibs are italic in writing style (have a special card or invitation to write?)