Hot top indicator light blinks a warning if the top is too hot to touch (>140°F) - even when the unit is turned off. Built-in holder accommodates optional 4 inch stainless steel support rods No.Worldwide regulatory approval - UL, CUL, IEC 1010, CE, and GS approved. The item "Corning 4 x 5 Inch Top PC-220 Hot Plate/Stirrer, 120V/60Hz" is in sale since Wednesday, October 7, 2020. This item is in the category "Business & Industrial\Healthcare, Lab & Dental\Medical & Lab Equipment, Devices\Lab Mixers, Shakers & Stirrers\Magnetic Stirrers & Hotplate Stirrers". The seller is "maxemesh" and is located in Marlborough, Massachusetts. This item can be shipped worldwide.