Dual Wall End Cap, I.D. Before Shrinking 1.38 in, I.D. After Shrinking 0.59 in, Temp. Range -55 Degrees to 110 Degrees F, Shrink Ratio 3:1, Length 3.31 in, Medium Wall, Use With Wire Size 4/0 AWG to 400 MCM, Wall Thickness After Shrinking 0.118 in, Material Cross-Linked Polyolefin with Adhesive, Shrink Tubing Properties UV Light , Flame Retardant No, Color Black, Adhesive Lined Yes, Application General, Dielectric Strength 1,000 V, Min. Shrink Temp. 248 Degrees F