The Pilot FriXion 0.7mm Refills (3-Pack) feature Pilot’s famous thermo-sensitive ink technology, which allows you to write, erase, and rewrite instantly without damaging your documents or leaving behind messy eraser crumbs. By choosing to refill your favorite FriXion Ball or Clicker pens instead of buying new ones, you’re making an eco-friendly choice that significantly reduces waste while keeping your notes perfectly polished.