Cold Shrink Insulator, Medium Wall, Material EPDM Rubber, Flexible, Flame Retardant No, Adhesive Lined No, Shrink Ratio 2:1, Use With Wire Size 1250 MCM to 2000 MCM, I.D. Before Shrinking 3.69 in, I.D. After Shrinking 1.68 in, Wall Thickness After Shrinking 0.06 in, Length 18 in, Shrink Tubing Properties UV Light , Color Black, Temp. Range -67 Degrees to 500 Degrees F, Package Style Individual Pieces, Dielectric Strength 1,000 V, Max. Temp. Rating 194 Degrees F