Steel City 55151 1/2 3/4 Octagon 4" Box Extension Ring is used when you need to add extra wire capacity to an octagon box. Mounts directly on top of the octagon box. Extender has 4 KO"s: one 1/2" conduit knockout on two side. and one 3/4" conduit knockout on 2 sides.

• Brand Name: Steel City
• Capacity: 15.8 cu in
• Shape: Octagon
• Material: Galvanized Steel
• Product Type: Box Extension Ring
• Color: Silver
• Width: 4 in.
• Height: 4 in.
• Depth: 1-1/2 in.
• Knockout Size: 1/ 3/4 in.
• UL Listed: Yes
• Number of Knockouts: 4
• Number in Package: 1 pk
• Application: For use with 4 inch octagon box
• Packaging Type: Bulk
• Box Type: Ceiling/Wall
• Diameter: 4 in.