The GeneralAire 7108 is the correct replacement drum assemly for the following humidifier models:
The GeneralAire 727-4 Humidifier Drum Assembly is a replacement drum assembly for the GeneralAire Legacy Models 747 and 747L Humidifiers. The 727-4 drum assembly includes the 727-12 evaporator sleeve, P188 retainer clip, 727-7 drum shaft, and 727-5 drum end. The GeneralAire 7108 drum assembly includes many essential components that will have your 747 series humidifier operating at peak efficiency.
GeneralAire 727-4 Humidifier Drum Assembly specifications: