Natural variations in tooth environment can have a major effect on color and shape perception. The Contraster Set provides a hand-held, non-reflective black background during visualization, photography and shade matching that allows for consistent results. Also useful for improving contrast when examining cervical caries or monitoring shade change during bleaching. Sturdy, matte-finish aluminum is curved to fit natural arch. Soft contoured edge ensures patient safety. Steam and chemical autoclavable to 275°F. Contraster Set includes Posterior and Anterior Contraster.