| Product Type: | Fan |
|---|---|
| Fan Diameter: | 24" |
| RPM: | 1150 |
| Amperage: | 3.7 |
| Horse Power: | 1/4 |
| Phase: | 1 |
| Voltage: | 120v |
| Blade Material: | Aluminum |

That fan has 3 blades and the material is described as aluminum and galvanized steel.
The variable speed control for this exhaust fan can be found here: http://www.supplyhouse.com/Fantech-5ACC06SC-5ACC-Speed-Control-6A