These 12 ft. 10 Gauge Jumper Cables feature copper-coated steel clamps for better conductivity. Color coded clamps for correct installation. Convenient storage case. ▪️Color coded red and black for positive and negative terminals ▪️Copper coated steel clamps ▪️Durable molded wire cable ▪️Copper coated aluminum cables ▪️150 amp capacity ▪️Includes storage case