Pilot® FriXion Ball® Fine 0.7 MM Black Gel Ink Erasable Pens. Erasing that works! Refillable. Writes smooth. Erases clean! Fine 0.7mm black ink. Writes smooth, Erases Clean! Erase and rewrite repeatedly without damaging documents - no wear or tear! Unique thermo-sensitive gel ink formula disappears with erasing friction. Smooth writing gel ink. Available in assorted ink colors. Refillable (available on www.pilotpen.us). www.pilotpen.us. ©Pilot Corporation of America.