| Body Material | : | Steel |
| Cable Entry | : | End, Side |
| Capacity | : | 21 cu-in |
| Color | : | Silver |
| Construction | : | Drawn |
| Depth | : | 1-1/2 in |
| Finish | : | Pre-Galvanized |
| Knockout Size | : | 1/2 in, 3/4 in |
| Length | : | 4 in |
| Number of Outlets | : | 1 |
| Shape | : | Square |
| Width | : | 4 in |
T&B® Steel City Extension Ring, 1 Outlets, 1/2 in, 3/4 in Knockout, 21 cu-in, End, Side Cable Entry, Square Shape, Drawn Construction, Steel Body, Silver, Pre-Galvanized, 4 in Length, 4 in Width, 1-1/2 in D