ELECTRICL BOX WAL SQR 4" *Brand Name: Southwire *Work Style: Old Work *Capacity: 21 cu in *Shape: Square *Material: Galvanized Steel *Product Type: Electrical Box *Color: Gray *Width: 4 in. *Height: 4 in. *Depth: 1.7 in. *Weather Resistant: Yes *UL Listed: Yes *Number of Knockouts: 16 *Number in Package: 1 pk *Box Type: Wall *Discovery ACC, CON, NBR, SUP, EXP