Steel City® Extension Ring, Square Shape, 21 cu-in, 12 Knockouts, 1/2 in Knockout, Steel, Pre-Galvanized, Silver, 4 in Length, 4 in Width, 1-1/2 in D
| Capacity | : | 21 cu-in |
| Color | : | Silver |
| Depth | : | 1-1/2 in |
| Finish | : | Pre-Galvanized |
| Knockout Size | : | 1/2 in |
| Length | : | 4 in |
| Material | : | Steel |
| Number of Knockouts | : | 12 |
| Shape | : | Square |
| Width | : | 4 in |