Cover Accepts Fan Bracket with Mounting Centers of 3-3/16 Inch; Base has Six Mounting Holes and 4 1/2 Inch Trade Size Knockout; #10 Mounting Studs Provided; Rated for Fans and Fixtures up to 50 Lb; RoHS Compliant; Made in USA

Specifications:

Type: Solid Base Fan Box
Depth: 1 Inch
Diameter: 5-1/2 Inch
Material: Steel
Finish: White
Approval: UL (Canada and US)
Used On: 500/700 Series One-Piece Steel Surface Raceway