4 in. 21 cu. in. Square Box Extension Ring
Square Box Extension Ring. This 2-Gang 1-1/2 in. Square Box Ring features 8 knockouts which are sized 1/2 in. and 3/4 in. Designed for indoor use. Less labor required to install 3/4 conduit to box.
Square Box Extension Ring. This 2-Gang 1-1/2 in. Square Box Ring features 8 knockouts which are sized 1/2 in. and 3/4 in. Designed for indoor use. Less labor required to install 3/4 conduit to box.