Description Description: The main components of the battery pile head is made of copper. Attachment screw and nut are not copper. Suitable for most vehicles Copper material has good conductive performance, good flexibility The pile head will not break, corrosion resistance, can reduce the voltage distortion and the current transmission loss. Corrosion resistance, good conductive performance, wiring is convenient, and the connection is firm. Specification: Color: Black+Red Material: aluminum red for positive terminal black for negative terminal Package Includes: 2 Pieces Battery Terminal Clamp Clips(3 Pack) Note: Please allow 0.5-1 inch difference due to manual measurement.(1 inch=2.54cm) Please check the size measurement and the picture carefully before making payment. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please understand,Thank you.