Made with premium #4 copper welding cable. Please enter your postal code to check availability. Made with premium #4 copper welding cable. Super heavy-duty 500 amp clamps used on both ends of cable. Product Specifications: Length: 12' (3.66 meters) Heavy duty battery jumper cables Made with premium copper welding cable Super heavy duty 500 amp clamps used on both ends of cable Forney Industries ITEM# 54722 are replacement 500 amp clamps The most reliable jumper cables you'll ever use!