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Product Description
Extension rings provide a means of adding additional cubic capacity or as an outlet box for surface conduit.
Cat# | Size | Depth | Hole Size | Knockouts | Thickness mm | ||
Sides | Bottom | End | |||||
HBE50178 | 4"x2" | 1-7/8" | 1/2" | 6x1/2" | / | 2x1/2" | 1.0-1.6 |
HBE75178 | 4"x2" | 1-7/8" | 3/4" | 4x3/4" | / | 2x3/4" | 1.0-1.6 |
HBEM178 | 4"x2" | 1-7/8" | 1/2" & 3/4" | 4x1/2" & 2x3/4" | / | 2x3/4" | 1.0-1.6 |