Perkins Large Cell BraillerWhy the Large Cell Perkins Brailler Enlarged braille cells creating more space between dots to accommodate people with tactile challenges The Large Cell Perkins Brailler has a 40% larger cell than the Classic Perkins Brailler, and the distance between the cells is ~50% wider. Same great features as the Classic Perkins Brailler: Durable, can use for complex math and language, and time tested. One year warranty, repair service trainings and repair