The top plate measures 10" x10". And has some stains due to regular usage. The hotplate can reach temp. Of up to 500C and boil 1 liter of water in about 20 minutes. The stirrer also works and at all settings. The item "Corning PC-620 Hotplate and Stirrer" is in sale since Monday, April 8, 2019. 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 "homealchemy" and is located in Elmhurst, Illinois. This item can be shipped to United States.