Raco 7824RAC 4" Round, Non-metallic Cable Ceiling Box, w/Nails, 23.5 cu. In.Raco 7824RAC 4" Round, Non-metallic Cable Ceiling Box, w/Nails, 23.5 cu. In. Features: RACO nonmetallic cable boxes provide the installer with a cost alternative that is lightweight and easy to install Self clamping wire entry clamps When mounted, box is flush with ceiling surface 3/8" set back Oversized nail support that resists hammer impact and prevents box deformationRaco 7824RAC 4" Round, Non-metallic Cable Ceiling Box, w/Nails, 23.5 cu. In. Specifications: Box Type: RACO Nonmetallic Boxes & Covers Box Family: Cable Ceiling Boxes Box Category: 4" Round Cable Ceiling Boxes - New Work Category: 4" Round Nail-up Style Wiring System: Non-metallic Sheathed Cable New or Old Work: New Work Cubic Inch Capacity: 23.5 Color: Black UPC Number: 050169978245 Made of heavy duty engineered compound Optional front-mounted grounding screw Round ceiling cable box with captive nails Without grounding plate UL listed 3/8" setback 23.5 cubic inch 4" diameter