Top Motor DF124028BM-PWMG 40x40x28mm 12 Volt 2 Ball Bearing 9000 rpm 0.40 amp 4.80 watts 16.36 cfm 16.25 mm/H2O 47.74 dBA 4 wires PWM Function Cooling Fan 1-Year Mfg Warranty Top Motor DF124028BM-PWMG Top Motor DF124028BM-PWMG 40x40x28mm 12 Volt 2 Ball Bearing 9000 rpm 0.40 amp 4.80 watts 16.36 cfm 16.25 mm/H2O 47.74 dBA 4 wires PWM Function Cooling Fan