Rubber Insulated Steel Clamps • Provides electrical insulation, vibration absorption, and protection of wire & cable, hydraulic hoses and loom from abrasion & shock • Holds lines firmly in place • Standard-Grade Stainless Steel for longer life • Insulation: Black Silicone Rubber is very flexible and provides superior heat resistance. Temperature range: -55°C to +300°C (-67°F to 572°F) Metal Width: 5/8" (15.9mm); Hole Diameter: 3/8"