Heat Shrink Tubing, Thin Wall, Material Cross-Linked Polyolefin, Flame Retardant Yes, Adhesive Lined No, Shrink Ratio 2:1, Use With Wire Size 4/0 AWG to 500 MCM, I.D. Before Shrinking 1 in, I.D. After Shrinking 0.5 in, Wall Thickness After Shrinking 0.04 in, Length 6 in, Color Black, Temp. Range -55 Degrees to 135 Degrees F, Package Style Individual Pieces, Min. Shrink Temp. 248 Degrees F, Dielectric Strength 600 V, Max. Temp. Rating 135 Degrees F, Min. Temp. Rating -55 Degrees F