6 Pack of Gray Kneaded Rubber / Gummy Erasers Absorbent Material Erases and/or Lightens Charcoal, Pastel, Chalk, Colored Pencils and Graphite Helps to Blend, Highlight, Shade, Smooth, Correct, and Brighten your Sketches and Drawings Easily clean by gently kneading the eraser between your fingers. Each eraser is 4 x 3 x 0.7 cm but will mold to any shape leaving no rubber residue.