The tough stainless steel frame and the thick Plexiglas top team together to provide a durable tool for years to come. Porta-Trace lightboxes provide bright even light and virtually eliminate "hot spots". U.L. listed cord and on/off switches. All models have color corrected lamps except PT1012-1 which is designed for crafts. Whether your application calls for drawing, tracing, embossing, calligraphy, viewing or presentation this is a lot of lightbox for the money.