8020: beveled rubber made of synthetic rubber, flexible and harder. It offers two erasing intensities: the pink eraser is flexible, to erase a wide range of graphite pencils on all kinds of paper, and the blue eraser is abrasive, for more intense erasing. Rubber measures: 6.3 x 2.4 x 0.9 cm. 118: soft, oval "breadcrumb" type synthetic rubber. To erase a wide range of graphite pencils on all kinds of paper. Assorted colors: white, pink, green. Measurements: 6.3 x 2.8 x0.9 cm.