The Pentel® Hi-Polymer® erasers are high quality latex-free erasers that remove lead easily and cleanly with very little pressure. No smudges no paper tears and no ghosting. Hi-Polymer erasers do not crack or harden with age and remain soft and ready to use when you need them. Block erasers come with a protective sleeve to keep you and the eraser clean. The small block style is perfect for getting into little corners while the large block erases large areas quickly.