
4" Diameter, Ceiling/Fixture Box with 16-24" Adjustable Bar Hanger and Speed Clamps, Fiberglass, Depth: 2-7/16", Cubic Inches: 22.5", Fixture Weight: 50 lbs.
Machine tapped fixture holes, rigid hard box construction, no distortion with high temperatures, shatter resistant with low temperatures, Speed "K" Clamps factory installed