Heat Shrink Tubing Thin Wall Material Polyolefin Flexible Flame Retardant Yes Adhesive Lined No Shrink Ratio 2 1 Use With Wire Size 4 AWG to 1 AWG I.D. Before Shrinking 0.54 in I.D. After Shrinking 0.25 in Wall Thickness After Shrinking 0.03 in Length 6 in Shrink Tubing Properties UV Light Resistant Color Black Temp Range -55 Degrees to 125 Degrees F Package Style Individual Pieces Min Shrink Temp 158 Degrees F Dielectric Strength 600 V Max Temp Rating 125 Degrees F