Prototype Popstop Fountain Pen – Double Blues/Brown fountain pen rest The Muse is capable of

The Muse is capable of using either a refillable converter or international cartridges of standard or short length

and while it requires human input to get it to the state in which I receive it

Weight: 17

but it's a brighter shade of blue with only a hint (maybe just a sniff) of green to it

Prototype Popstop Fountain Pen – Double Blues/Brown fountain pen rest The Muse is capable ofNote: This pen will ship with a short international cartridge. It will accept converters with a maximum length of 2. 75", but one is not included with the pen. This is a prototype pen with a deployable rollstop. Simply press the colored circle in the cap against the sharp edge of a table and the rollstop pops out. Leave it this way or leave it flush for a streamlined look. Or, push it out entirely with a pencil for a unique look or to use as a lanyard