Features: Rugged and durable, not easily damaged. The pile will not break, corrosion resistance, can reduce the voltage distortion and the current transmission loss.wiring is convenient, and the connection is firm. Fit for most car, boats, battery.Clearly Marked with (+) Positive or (-) Negative for Easy Polarity . 2 copper spacer shims provided in case the posts are not big enough, also the copper material is more conductive and flexible. This model is: car battery pile, made of zinc alloy, and nickel-plated to prevent oxidation. There are 4 wiring outlets for easy modification of wiring. Package Includes: 1Set Car Battery Terminal Specifications: Material:Brass,ABS Type:Silver + Gold Shims,Gold + Gold Shims,Silver + Silver Shims (optional) Length:Approx.4.8cm/1.89'' note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.