Wide x 13 1 2 in. They re only 2 5 8 in. Both units have an adjustable on off temperature range of 160 to 240 degrees fahrenheit and will work with flx 412 electric fan.
Flex A Lite Lo Profile S Blade Fans Starting From 387 99 Ea Dual Low Profile Puller Fans With S Blade Design Are Quieter Electric Fan Business Straight Blade