White replacement eraser 30 pieces of 5x25mm & 40 pieces of 2.3x25mm ( Total 70 pieces ), Refill (Supplement ) for Brustro Slim Battery operated eraser . FUNCTIONS OF WHITE ERASER – Used to erase out writing by graphite pencils without smudging. Erases precisely. Can also be used to erase from films. Selective highlights can be created in already existing drawings, e.g. signature can be added. Brustro is a registered trademark of Creative Hands Art Materials Pvt.