THIS IS A WORKING CORNING PC-520 HOTPLATE STIRRER WORKING. Thank You For Looking At Are Item9. The item "Corning PC-520 Ceramic Surface Lab Hotplate Stirrer TESTED" is in sale since Saturday, January 13, 2018. This item is in the category "Business & Industrial\Healthcare, Lab & Life Science\Lab Equipment\Stirrers". The seller is "buyhitek" and is located in Milton Freewater, Oregon.