The Retro 51 Easy Flow Ink Refill has lower viscosity ink than your everyday ball pen ink. This fluid helps the Easy Flow pen live up to its name because it creates an ultra-smooth ink flow that makes writing enjoyable. The Easy Flow ink refill fits most b
The Retro 51 Easy Flow Ink Refill has lower viscosity ink than your everyday ball pen ink. This fluid helps the Easy Flow pen live up to its name because it creates an ultra-smooth ink flow that makes writing enjoyable. The Easy Flow ink refill fits most ball pens.
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