Pentel Hi-polymer Block Eraser, Large, 3 Pack, White (ZEH10BP3-K6). 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. No wonder they are the #1 brand eraser in the country. Due to popular demand, we developed Hi-Polymer pencil cap erasers that fit most wood case pencils. Each of our block erasers come with a protective sleeve to keep you and the eraser clean. We recommend that you keep the eraser in the sleeve to extend the life of your eraser.