4 in. Square Steel Box Extension Gray

Brand Name: Southwire
Shape: Square 
Product Type: Box Extension 
Color: Gray 
Material: Steel 
Height: 4 in. 
Weather Resistant: No 
Application: For Surface Conduit 
Knockout Size: 1/2 in. 
Box Type: Ceiling/Wall 
UL Listed: Yes 
Capacity: 22-1/2 cu. in. 
ETL Listed: No 
CSA Listed: No 
Packaging Type: Bulk 
Number in Package: 25 pk 
Number of Knockouts: 12