Air Vent a Gibraltar Industries company， manufactures a full line of attic ventilation products， including durable， high-performance ridge vent systems. Over the years， we've invested heavily in independent research studies to further our understanding and enhance our design of high efficiency attic ventilation systems.

• Brand Name: Air Vent
• Opening Width: 4 in.
• Opening Length: 4 in.
• Finish: Mill
• Color: Silver
• Material: Aluminum
• Product Type: Mini Louver
• Coverage Area: 2.9 sq in
• Exterior Length: 4 in.
• Exterior Width: 4 in.
• Design: Round
• Net Free Area: 2.88 sq.in.