6" Brown Plastic Air Intake Louver Vent - Item #606B | Lambro Industries
Fresh Air Louvers manufacturer | Sand Trap Louver | Damper | HVAC Parts
6" LOUVERED AIR INTAKE HOOD WITH ALUMINUM PIPE - BLACK | Zion Building Supplies
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