The Hotplate Stirrers Series CD162, SD162 is manufactured by Stuart. The product has compact and durable design because it is made either of aluminum silicon alloy or glass ceramic and can resist chemicals especially the ceramic tops. It also comes with a blinking warning light and the sign on it say Hot. Lastly, the product measures 160 mm x 160 mm and the heated area either measures 120 mm x 120 mm or 160 mm x 160 mm.