Mar-Flex Vortex Telescopic Vent with Screen, Expands from 7-1/2" to 10"

Mar-Flex vortex vents are telescoping foundation vents, able to expand from 7-1/2" to 10" deep. A single vent can fit 8", 9" and 10" walls.

• Adjustable and telescopic for maximum versatility
• Can be used in poured-concrete or block wall applications
• Does not chip or corrode
• High-density polyethylene construction
• Easy access controls that allow user to adjust airflow
• Easy to install
• Clear Vent Area - CVA 31.4 - screen included
• 19-1/4 inches wide x 11-1/4 inches tall x 7-1/2 inches to 10-inches deep (adjustable)