Heat Shrink Tubing Kit, Thin Wall, Material Polyolefin, Flexible, Flame Retardant No, Adhesive Lined Yes, Temp. Range -67 Degrees to 230 Degrees F, Shrink Ratio 3:1, Number of Pieces 42, Includes (12) 3/4 in, (24) 1/2 in, (6) 1 in, Color Black, Red, Length 6 in, Shrink Tubing Properties Acid and Alkali , Package Style Sticks, Kit Contents Multiple Sizes, Use With Wire Size 6 AWG to 500 MCM, I.D. Before Shrinking 1 in, 1/2 in, 3/4 in, Dielectric Strength 700 V