Heat Shrink Tubing, Heavy Wall, Material Cross-Linked Polyolefin with Adhesive, Rigid, Flame Retardant No, Adhesive Lined Yes, Shrink Ratio 3:1, Use With Wire Size 250 MCM to 750 MCM, I.D. Before Shrinking 2 in, I.D. After Shrinking 0.07 in, Wall Thickness After Shrinking 0.17 in, Length 9 in, Shrink Tubing Properties Abrasion , Acid and Alkali , UV Light , Color Black, Temp. Range -67 Degrees to 230 Degrees F, Package Style Individual Pieces