Corning 6795-220 PC-220 Stirring Hot Plate with 4" x 5" Pyroceram Top, 25 to 550 Degrees C, 120V Temperature range of 25 to 550 degrees C White glass-ceramic top plate for fast heating and resistance to chemicals and scratches Analog temperature control with knob provides 10 settings Speed range of 60 to 1,150 rpm with 10 dial settings Maximum temperature limiting and hot top indicator light help ensure safe operation