Electrical box penetrations in walls can represent a source of uncontrolled air infiltration. These rigid plastic insulated electric switch covers have a pre-installed foam gasket on the back side, resulting in little, if any, uncontrolled air infiltration. This model is for use with standard toggle wall switches in single-gang electrical boxes.
Packaging: plastic bag
Air-Tite Single Electrical Switch Sealing Cover AIR002 Product Reviews