P&S 4-inch Round Ceiling Box

4 Round Ceiling Box with a bar hanger that adjusts to 16 or 24 joist spacing .It has four Auto/Clamps. It is constructed with impact-resistant Noryl thermoplastic, making it virtually unbreakable and non-conductive. Its depth-mounting gauge at bottom of bracket helps you align the box at the proper depth relative to the ceiling

• For spans from 16 to 24 inches
• UL listed for fan ( up to 70 lbs) and fixture support (up to 110 lbs)
• Self-leveling feet
• Maximum weight rating shown for 16 inch spans
• Ground screw pre-installed
• Boxes include top knockouts
• 16 cubic inch volume
• 1.5 inch depth