Set of 2, White and Blue This is an eraser specifically for the "Frixion Series" erasable pens. By rubbing, frictional heat is generated, allowing you to erase the ink written with Frixion ink. The oval cross-section fits comfortably in your hand, making it easy to use for both fine details and large areas. #piero's Stationery Store - Touch here for all products Frixion Refills　　Frixion Ball　　Frixion Eraser　　Frixion Knock　　Frixion Stamp　　Frixion Highlighter Frixion Synergy　　Frixion Color　　Frixion Ball Multi-Color