These are excellent quality back draft dampers
They are made from heavy-gauge galvanized steel with heavy duty springs
They use both an embossed bead and rubber gasket to help keep ducting securely in place
They prevent back draft air when your fans are off

Technical Details

Product Details

Product Dimensions

Package Dimensions
Width : 4.5 inch
Height : 3.7 inch
Length : 5.6 inch

Item Weight: 0 ounce (View shipping rates and policies)
Shipping Weight: 2.9 pounds (View shipping rates and policies)

ASIN : B004JKDNG0