Heat Shrink, Thin Wall, Cross-Linked Polyolefin Tubing, Color: Black, Conductor Range: 2 AWG - 250 MCM, Shrink Ratio: 2:1, Nominal Diameter: 3/4", Recovered Insulation Diameter: 0.374", Tube Length: 48". Recovered Wall Thickness: 0.027". Provides: Flame, Moisture and Abrasion Protection in Stain Relief and Wire Bundling Applications.