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New Pull Box Extenders from Hoffman®

The Type 1 pull box extenders allow you to increase the wire capacity of an installation without removing the existing pull box, saving you time and money. Additionally, extenders reduce the need for custom pull box sizes during installation.


  • 20 Step-Up sizes in 4-inch depths are available in painted mild steel or galvanized finishes.
  • Extenders can be configured to create 40 additional sizes when combined with existing pull boxes.
  • Keyhole screw slots allow easy installation.
  • Extenders and accessories maintain UL Type 1 rating.

 Hoffman Pull Box Extender Spec Sheet