No further testing or specific testing has been performed so we are only guaranteeing what was written above. The item "Corning PC-320 Hot Plate Magnetic Stirrer 5 x 7 120V Stirring Analog Heater" is in sale since Monday, May 21, 2018. This item is in the category "Business & Industrial\Healthcare, Lab & Life Science\Lab Equipment\Heating & Cooling\Burners & Hotplates". The seller is "jpagora" and is located in Queens Village, New York. This item can be shipped to United States.