Extension ring, length 4in., width 201.7in., depth 1-7/8in., capacity (cubic in) 13.0, knockout (in) 1/2
Item#: PI390
Extension Rings, 4 in. length, 2-1/8 in. width, 1-7/8 in. depth, 13.0 cubic in. Capactiy are used when extra cubic inch capacity is needed for additional wiring. Galvanized steel.