Extension Box, 1-Gang, 500/700 Series Metal Raceway, Steel, Ivory

This 1-gang, open base extension box is composed of steel and is intended for use with HBL500, HBL700, and HBL750 Series Raceways. The dimensions of the extension box are 1-1/2 IN L x 3 IN W x 4-1/2 IN H.