Genuine, OEM GeneralAire 55 replacement cylinder for 5500 steam humidifier. Replace your cylinder at least once per year, at the beginning of humidification season. This model is for both regular and low conductivity humidification.

IMPORTANT:  Be sure to feel for, and hear the "CLICK" when attaching cylinder wires to ensure solid connection.

14" long x 18" round x 5 1/2" wide