Universal Heat Protect Flexible Sleeving (25815) by Vibrant Performance. Nominal Size: 0.625in. Length: 5 Feet. Use with AN Hose: 6. Color: Available in Black only. The Heat Protect sleeving is highly flexible and is engineered to protect hoses, cables and wire harnesses from damage caused by exposure to extreme heat, open flame and weld sparks. It will also contain radiant heat, saving nearby components from heat damage. This sleeving will resist automotive chemicals and solvents and provides protection from abrasions, punctures and moisture.