Raco 4 in. H Square 2 Gang Extension Ri *Height: 4 in. *Shape: Square *Material: Steel *Number of Gangs: 2 gang *Product Type: Extension Ring *Color: Metallic *Hole Configuration: 2 Gang *Width: 4 in. *Packaging Type: Bulk *Number of Knockouts: 12 *Depth: 1.5 in. *UL Listed: Yes *Number in Package: 1 pk *Capacity: 22-1/2 cu. in. *Knockout Size: 1/2 & 3/4in. *Extension rings provide a means for adding cubic capacity or as an outlet box for surface conduit