Marlin Liqui-Liners roller ball pens 0.7mm 1’s Black x 12

Marlin Liqui-Liners roller ball pens have a unique design with a handy see through window which allows you to monitor how much ink is left. Each pen contains a smooth writing rollerball nib so they?re perfect for your everyday writing needs.
Each pen has a medium 0.7 mm nib which provides greater control for detailed, precise strokes.
You can use the pens for everyday writing and drawing.
The smooth flowing liquid ink delivers a consistent writing experience.
Each pen has a window in the barrel so you check how much ink is left.
The pens contain Uni Super Ink which is permanent, waterproof and fade proof once dry.