FM Bracket 4" Square Red Alarm Box Welded Metallic. Depth: 3-1/2". Side Knockouts(10) 1/2" & 3/4" (concentric). Bottom Knockouts: (4) 1/2" & 3/4" (concentric). End Knockouts: (8) KOs. Cubic Inches: 40.5". UL Listed for Use in 2 Hour Fire Rated Walls.Color:
FM Bracket 4″ Square Red Alarm Box Welded Metallic. Depth: 3-1/2″. Side Knockouts(10) 1/2″ & 3/4″ (concentric). Bottom Knockouts: (4) 1/2″ & 3/4″ (concentric). End Knockouts: (8) KOs. Cubic Inches: 40.5″. UL Listed for Use in 2 Hour Fire Rated Walls.Color: RedDepth: 3 1/2 inKnockout Diameter: 1/2 inKnockout Diameter: 3/4 inMounting: BracketMounting: Screw OnMaterial: SteelColor: RedMounting: Nail OnColor: RedCubic Inches: 40.500 in
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