
3-1/2" Diameter, Nail-On, Ceiling/Fixture Box with Speed Clamps, Thermoset Fiberglass, Depth: 2-7/8". Cubic Inches: 20.5". Fixture Weight: 50 lbs. Includes: null, Ground Strap.
Machine tapped fixture holes, ground strap, rigid hard box construction, no distortion with high temperatures, shatter resistant with low temperatures, Speed "K" Clamps factory installed