Alc Series Cushion Hanger | 1.70 in Length X 2.09 in Height, 0.44 in Thread Length, for Armored Cable, Flexible Metal Conduit and Metal Clad Cable | It Has Set Screw for Locking Fixture Stem; Protects Fixture Against Wind and Vibration Damage; Dual Function - Conduit Outlet Box and Fixture Hanger; Can Be Wired at Work Bench; for Added Protection Where Lighting Fixtures Are Subjected to Vibration