Heat Shrink Tubing, , Thin Wall, Material PVC, Flexible, Flame Retardant Yes, Adhesive Lined No, Shrink Ratio 2:1, I.D. Before Shrinking 2.5 in, I.D. After Shrinking 1.25 in, Wall Thickness After Shrinking 0.06 in, Length 50 ft, Shrink Tubing Properties UV Light , Color Black, Temp. Range -4 Degrees to 221 Degrees F, Package Style to Length, Min. Shrink Temp. 212 Degrees F, Dielectric Strength 600 V, Max. Temp. Rating 221 Degrees F, Min. Temp. Rating -4 Degrees F