The GeneralAire 7943 is the correct replacement damper disk for the following humidifier models:
The GeneralAire 950-5 Humidifier Damper Disk is a replacement damper disk for GeneralAire Elite Models 950, 950X, and 1099LHS. The 950-5 damper disc attaches to the 950-2 side panel discharge through the 900-11 damper knob. This damper disk, also known as the 7943, is an OEM part and is made from quality material in order to provide you with the proper humidification.
GeneralAire GA4299 950 Humidifier Orange Orifice specifications: