Heat Shrink Breakout Boot, Number of Breakouts 2, I.D. Before Shrinking 1.2 in, I.D. After Shrinking 0.6 in, Breakout I.D. Before Shrinking 0.5 in, Breakout I.D. After Shrinking 0.17 in, Material Polyolefin, Semi Rigid, Shrink Ratio Not Applicable, Flame Retardant Yes, Length 3.5 in, Color Black, Shrink Tubing Properties Abrasion , Acid and Alkali , Temp. Range -67 Degrees to 230 Degrees F, Wall Thickness After Shrinking 0.8 in, Dielectric Strength Not Applicable