
Extension rings provide additional cubic capacity. May be used an outlet box fro surface conduit. Constructed from 1/16 in pre-galvanized steel.
| Finish | : | Galvanized |
| Height | : | 4.046 in |
| Length | : | 1-1/2 in |
| Material | : | Steel |
| Number of Gangs | : | 1 |
| Number of Knockouts | : | 12 |
| Type | : | Square |
| Width | : | 4 in |