Heat Shrink Tubing, , Thin Wall, Material Acrylate Olefin, Flexible, Flame Retardant No, Adhesive Lined No, Shrink Ratio 2:1, Use With Wire Size 6 AWG to 1 AWG, I.D. Before Shrinking 0.5 in, I.D. After Shrinking 0.25 in, Wall Thickness After Shrinking 0.03 in, Length 4 ft, Shrink Tubing Properties , Color Black, Temp. Range -67 Degrees to 250 Degrees F, Package Style Individual Pieces, Min. Shrink Temp. 250 Degrees F, Dielectric Strength 1,800 V