This little battery-operated eraser weighs only 2.4 ounces (including its 2-AAA batteries, included with purchase), yet it can perform as well as many larger electric models. This eraser’s small size and gentle contours combine to allow exceptional control- this is a tool anyone responsible for book and paper care will want to have handy. It comes complete with 10 white vinyl nocs erasers for use on pencil marks and 10 blue erasers for use on drafting ink. Two spare vessels for the erasers are also included. Refills of either the blue or the white erasers are available separately in boxes of 70.