The GeneralAire 7636 is the correct gasket kit for the following humidifier models:
The GeneralAire 50-16 Internal Humidifier Gasket Kit is an internal humidifier gasket kit for use with the GeneralAire Elite Steam Humidifier models DS50 and DS50LC. The 50-15 includes a filter and gasket, both of which are crucial components of your Elite Steam humidifier. With this kit you will have your DS50 model running at peak efficiency and humidifying your home. This gasket is an OEM GeneralAire part and is very durable.
GeneralAire 50-16 Internal Humidifier Gasket Kit specifications: