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

• Auto/Clamp cable clamps molded in, hold wire securely in box.
• UL Listed for fixture support, up to 50 pounds.