Vent Systems 8" Inch Soffit Vent Cover - Round Air Vent Louver - Grill Cover - Built-in Bird Screen - HVAC Vents for Outside Use, Home Office, Kitchen - Industrial Aluminum Alloy Grille 8 Inch Aluminum is up for auction in Industrial & Scientific. The current bid is $1.00, 96% below the $28.00 MSRP, in New/Like New condition. This auction has ended — similar items appear in live auctions regularly.