|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Double-flap system insulates for energy efficiency. Aluminum frame with durable plastic telescoping tunnel. Can be installed in interior or exterior walls or doors 4-3/4" to 7-1/4" thick, including siding, stucco, and even brick. Add an extension tunnel for deeper walls. Features 2 flaps, one in the inner frame and one in the outer frame.
|
|
|
