ACDelco 4SX58 GM Original Equipment Positive Battery Booster Cable Include factory crimped copper alloy cable terminals to ensure electrical connectivity and durability not found with emergency type bolt-on or spliced battery cable terminals Features durable outside insulation to help protect the copper cable from severe under hood conditions, such as oil, acid, heat, ozone, and road splash Meets SAE J1127 requirements and is rated for continuous use temperatures up to 257 degrees Fahrenheit (125 degrees Celsius) for safety and dependability Common strand size provides high strand count to improve conductor flexibility Steel skeleton embedded in casting for more reliable electrical connection