Maximum airflow Screen prevents nesting Spring loaded damper prevents outside elements from entering vent Color/Finish Family: Silver Manufacturer Color/Finish: Mill Type: Wall cap Maximum Ceiling Height (Feet): 15 Size: Universal Duct-Free: No For Use With: Universal Material: Aluminum Total Number of Pieces: 1 Warranty: 1-year limited CA Residents: Prop 65 Warning(s): No UNSPSC: 52141500