9351-NK 4" Round Ceiling Box, Nail-On, 2-3/8" Deep, Non-Metallic

4 Inch Diameter, Nail-On, Ceiling/Fixture Box with Speed Clamps, Thermoset Fiberglass, Depth 2-3/8 Inch, Cubic Inches 22.5 Inch. Fixture Weight 50 Pound

Machine tapped fixture holes, rigid hard box construction, no distortion with high temperatures, shatter resistant with low temperatures, Speed "K" Clamps factory installed