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”. UL 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. Newly designed Porta-Trace lightboxes virtually eliminate "hot spots" providing uniform light distribution over the entire viewing area. Sturdy stainless steel frame boxes are only 3" thick. The 1/4" thick plexiglass top is mounted flush for uninhibited use of a straightedge. U.L. listed cord and on/off switch. NOTE: 18 x 24 and 24x 36 inch features a carrying handle.