Heat Shrink Tubing, Thin Wall, Material Polyolefin with Adhesive, Flexible, Flame Retardant Yes, Adhesive Lined Yes, Shrink Ratio 3:1, Use With Wire Size 4/0 AWG to 500 MCM, I.D. Before Shrinking 1 in, I.D. After Shrinking 0.32 in, Wall Thickness After Shrinking 0.1 in, Length 4 ft, Shrink Tubing Properties Abrasion , Acid and Alkali , Color Black, Temp. Range -67 Degrees to 230 Degrees F, Package Style Individual Pieces, Min. Shrink Temp. 250 Degrees F