Uni Style Fit Multi Pen is a wonderfully customizable multi pen. These lightweight pen bodies are available in different styles of single, 3, 4, and 5 pen bodies. They are refillable with Uni Style Fit Refills in different thicknesses and colors, so you can have all your favorite ink colors wherever you go! Easily swap out refills by unscrewing the bottom of the pen and inserting your colored refills of choice.