Color:w/Thermal Conductive PadDescription: External dimensions: 1.6 * 1.6 * 0.1IN Internal resistance: 2.1 ~ 2.4OHM (ambient temperature of 23 ± 1 'C, 1kHZ Ac test) The maximum temperature difference: Tmax (Qc = 0) above 59 'C. Working current: Imax = 4.3-4.6A (rated at 12V) Rated voltage: 12V (Vmax: 15V starting current 5.8A) Cooling power: Qcmax 55W Working environment: temperature range -55 'C ~ 83'C (high ambient temperature drop directly affect the cooling efficiency Thermal Conductive Pad Description: Size: 1.57x1.57x0.02" (40x40x0.5mm). Can be applied for thermal interface of 40mm heat sink with stepper motors of 3D printers, NEMA 17, TEC1-12706 Thermoelectric Peltier Cooler etc Package Included: 2 x TEC1-12706 Thermoelectric Cooler 2 x Thermal Conductive Pad