Heat Shrink Tubing, Medium Wall, Material Polyolefin with Adhesive, Semi Rigid, Flame Retardant Yes, Adhesive Lined Yes, Shrink Ratio 3:1, Use With Wire Size 8 AWG to 3 AWG, I.D. Before Shrinking 0.8 in, I.D. After Shrinking 0.22 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