Thermo Scientific SP195025 Cimarec Analog Basic Stirring Hot Plate with 7.25" x 7.25" Ceramic Platform and Integral Ring-Stand Holder, 11.1" Length x 8.3" Width x 5" Height, 150 to 538 Degree C, 120V/60Hz Temperature range of 150 to 538 degrees C (302 to 1,000 degrees F) White ceramic top plate for fast heating and resistance to chemicals and scratches Analog temperature control with knob Speed range of 100 to 2,500 rpm with analog knob control Integrated ring stand mount holds a 1/2-inch diameter rod (sold separately)