Want to keep your battery connections free of corrosion? Replace or install these color-coded anti-corrosion rings. While they won't totally stop corrosion from forming, they will delay its occurance.
Red for positive and green for ground make connecting test leads and jumper cables quick and identifying them easy. They also prevent battery acid from corroding the terminals. For the best possible contact between the post and terminal, clean the post and cable with the wire brush tool.
