"For (2) 0.405 to 0.612 in Cable, 1.738 in Width X
Ball Joint Permits 20 Deg Swing; Protects Fixture Against Wind and Vibration Damage; Dual Function - Conduit Outlet Box and Fixture Hanger; Can Be Wired at Work Bench

• Special Features: Ball Joint Permits 20 Deg Swing; Protects Fixture Against Wind and Vibration Damage; Dual Function - Conduit Outlet Box and Fixture Hanger; Can Be Wired at Work Bench "For (2) 0.405 to 0.612 in Cable, 1.738 in Width X
• Standard: Ul File Number E109438