Red, electric box insert pad 4.25 inch x 4-1/2 inch X 1/8 inch square. The pad is conveniently sized to fit a typical 1-1/2 inch deep 4S box with no cutting or piecing required. Plastic and steel faceplates.
SpecSeal® PowerShield® electrical box inserts expands a minimum 24 times its original size when exposed to high temperatures or flames. Requiring no tools, SpecSeal® PowerShield® electrical box inserts are conveniently sized to fit typical switch or outlet boxes and features an adhesive strip applied to the back of the pad to ensure adhesion to the back of an electrical box. SpecSeal® PowerShield® electrical box inserts are easily applied into an existing box with no mess or residue.