Made of High Quality, Zinc Electroplated (Galvanized), Malleable Iron for Long Lasting Strength Zinc Plated for Corrosion Resistance Aluminum Lay-In Lug for Easy Adjusting Thermoplastic Insulated Bushing Rated To 150°C UL Listed - Industry Standard. Grounding Bushings are used to bond and terminate threaded Rigid/IMC conduit to a cabinet, box, or other enclosure. The lay-in-lugs are adjustable to allow for simple positioning and access to conductor during installation. The thermoplastic insulator helps to protect conductor jackets during installation and use. Great for indoor or outdoor use. Made of Zinc Plated Malleable Iron for corrosion resistance and lasting durability. Thermoplastic Insulation Rated to 150°C. UL Listed.