Corning® Hot Plate/Stirrers have been a laboratory standard for many years. Microprocessor control combined with hi-tech insulation makes these hot plate/stirrers fast, consistent, and energy efficient. Easy-to-read controls allow precise settings. Corning's exclusive glass-ceramic Pyroceram® top, is easy to clean and resistant to corrosion and chemical attack. Top size measures 4" x 5". Rarely used. Excellent condition.