GeneralAire 45-3 Humidifier Filter. 

GeneralAire is also known by the following spelling variations: GeneralAir, General Aire, and General Air. The General Aire Evaporator Pad is not washable or cleanable.

• Part 45-3
• Dimensions: 5" x 5.5"
• Replace once every 12 months
• Fits GeneralAire 45 Humidifiers