Heat Shrink, Thin Wall, Cross-Linked Polyolefin Tubing, Color: Black, Conductor Range: 2/0 AWG - 500 MCM, Shrink Ratio: 2:1, Nominal Diameter: 1", Recovered Insulation Diameter: 0.500", Tube Length: 48". Recovered Wall Thickness: 0.031". Provides: Flame, Moisture and Abrasion Protection in Stain Relief and Wire Bundling Applications.