Comparison : Item # 9CRA0948P0G601, 48V Counter Rotating DC Fan (w. Pulse Sensor & PWM Controller)
Item # 9CRA0912P0G001, 12V Counter Rotating DC Fan (w. Pulse Sensor & PWM Controller)
Item # 9CRA0412P4K03, 12V Counter-Rotating DC Fan (w. Pulse Sensor & PWM Controller)
Item # 9CRA0612P6K001, 12V Counter Rotating DC Fan (w. Pulse Sensor & PWM Controller)
Item # 9CRA0812P8G001, 12V Counter Rotating DC Fan (w. Pulse Sensor & PWM Controller)