Hot plates feature a sturdy stainless steel case that resists spills and corrosion and supports heavy loads. The 6-1/4'' x 6-1/4'' hot plates have a 20 lb maximum load capacity; all other models have a 40 lb maximum load capacity. Heating surface resists warping and buckling. Embedded heating elements provide better heat transfer and have a longer life than ''open-coil'' designs. Perforated side plates on the 12'' x 12'' and 24'' x 24'' hot plates allow air circulationkeep controls cool to the touch. For added safety, an indicator lights up when power is supplied to the heating element. What's Included: models 03400-00 through 03452-00 are supplied with a 6-ft, three-wire cord with U.S. standard plug. Cord and plug are not included with high-wattage models 03460-00 and 03462-00; they must be connected through a system.