Pully TEC1-12720 12V 20A 40mm x 40mm Heatsink Thermoelectric Peltier Cooler Square Ceramic Thermoelectric Cooling Module Plate Power Generator Model number: TEC1-12720 Usage: Refrigerator/Warmer Dimensions : 40mm x 40mm x 3.0mm QMax (W) : 39W Tmax(C)67