Uni Jetstream Edge Ballpoint 0.28mm Pen - Black COLORVERSE It is recommended to clean

It is recommended to clean your pen when it is not in use or every 4-6 weeks

Allows the extender to slide into the clip of the existing Blackwing ferrule and will work with any Blackwing pencil model

30ml bottled fountain pen ink

the machine that produced the system’s ferrule and eraser system broke

Uni Jetstream Edge Ballpoint 0.28mm Pen - Black COLORVERSE It is recommended to cleanDETAILS 0. 28mm oil based ballpoint pen with black ink Low viscosity ink for smooth and rich writing Low center of gravity for excellent stability and control Sturdy wire pocket clip Water resistant, fade resistant, and forgery resistant Refills available