8" White Plastic Air Intake Louver Vent - Item #608W | Lambro Industries
Aluminum Fixed Air Intake Louver
Aluminum Stationary Louver Air Intake Louvers, For Industrial, Size: 4.5 X 2 Feet
Plastic Wall Vent w/Fixed Louvers 6 Inch Pipe | for Intake and Exhaust Applications + 1 Inch Collar for Secure Pipe Attachment + Molded Screen + Available in White and Brown - FAMCO - Amazon.com