Heat Shrink Breakout Boot, Number of Breakouts 2, I.D. Before Shrinking 3 in, I.D. After Shrinking 1.9 in, Breakout I.D. Before Shrinking 1.45 in, Breakout I.D. After Shrinking 0.5 in, Material Polyolefin, Semi Rigid, Shrink Ratio Not Applicable, Flame Retardant Yes, Length 5 in, Color Black, Shrink Tubing Properties Abrasion , Acid and Alkali , Temp. Range -67 Degrees to 230 Degrees F, Wall Thickness After Shrinking 0.12 in, Dielectric Strength Not Applicable