Look Broan 509 180 CFM 6.5 Sones Through Wall Ventilation Fan, White Square Plastic Grille

Broan 509 8" Through Wall Ventilation Fan 180 CFM 6.5 Sones 8-3/8" Diameter Sleeve Specially Designed Polymeric Fan Blade Housing Adjusts to Fit Walls from 4-1/2" to 9-1/2" Thick Built-In Damper Minimizes Backdrafts Permanently Lubricated Motor with "Twist-Lock" Installation 180 CFM 6.5 Sones 8 3/8-Inch diameter sleeve Specially designed polymeric fan blade Housing adjusts to fit walls from 4 1/2-