Ultima heatshrink is manufactured using flame-retardant/self-extinguishing polyolefin making it suitable for most automotive applications. Dual Wall heatshrink combines an increased wall thickness with adhesive to create an increased level of strain relief not achievable with standard heatshrink tubing. The use of adhesive also creates a waterproof seal. Key Features: Uses Flame-Retardant and Self-Extinguishing Polyolefin Suitable For Most Automotive Applications Dual Wall Handles Increased Level of Strain Seals Water Tight Item #'s: UT-56604 -2 Specifications Comprises 45mm Lengths 50 x 2.5mm Black, 20 x 4.5mm Black, 10 x 10mm Black, 20 x 2.5mm Red,10 x 4.5mm Red,10 x 10mm Red, 30 x 3.5mm Black,10 x 6mm Black,10 x 13mm Black, 15 x 3.5mm Red,5 x 6mm Red,10 x 13mm Red; 75mm Lengths 8 x 20mm Black, 8 x 20mm Red