8" Aero-Flo Model Inline Duct Fan 420 CFM 420 Free Air Rated CFM's (Make sure you know the Free Air rating of your fan!) 8" Diameter 7-1/4" Length 120v 37 Watts .64 Amps 266 Degree F. Max Operating Temp (Great for Wood Stoves) Permanent Lubrication-Impedance Protected-Oneshot Thermal Fuse