1 1/4" Insulated Metallic Grounding Bushings, Tin-Plated Open-Type Lug, Dual Rated For CU-AL Conductors, Thermoplastic Liners Rated 105 Degrees Celsius, Die Cast Zinc, Used To Provide A Smooth, Well-Rounded Bearing Surface For Wires Or Cable At The End Of Threaded Conduit Or A Conduit Connector As Required By The NEC, Lay-In Type Lug Provides For Easy Attachment Of A Grounding Conductor, UL & CSA Approved.