Pilot FriXion Clicker Retractable Gel Ink Pens Erasable Fine Pt 0.7mm & Refills Navy Blue3 Pilot 31477 PensThree 2pks of Pilot 77326 RefillsFriXion Ball Pens Have a Unique Thermo-Sensitive Gel Ink Formula That Disappears with Erasing Friction.Rewritable-Erase and Rewrite Repeatedly Without Damaging Documents – No Wear or Tear!The thermo-Sensitive Gel Ink Formula Disappears with the Erasing Friction of a Rubber Tail Plug Eraser on the Top of Each Pen.