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 12 AWG to 6 AWG, I.D. Before Shrinking 0.4 in, I.D. After Shrinking 0.15 in, Wall Thickness After Shrinking 0.09 in, Length 4 ft, Shrink Tubing Properties Abrasion , Acid and Alkali , UV Light , Color Black, Temp. Range -67 Degrees to 230 Degrees F, Package Style Individual Pieces