Pangda 6 Pieces Battery Terminal Anti Corrosion Washers Fiber battery post shims Battery Terminal Protector battery corrosion cleaner (3 Red and 3 Green)

works great

Work as expected and after several months no more corrosion has occurred. Great way to inexpensively protect your battery terminals.

Purchased this but haven't used them yet

I took a leap of faith, to try to ensure corrosion would be halted or minimized. To save $90, which my mechanical maintenance shop would charge, I purchased 3 items for about $35 to clean them myself, not really KNOWING some would help slow the process of routine corrosion (which I read) could diminish my battery charging capability. I currently need time to gauge the impact of choosing the rings, but the product appears well- made and fits my terminals. They also assist to prevent misidentifying the polarity of my terminals, & at a decent value. I cleaned and added these to my 2 cars’ batteries after cleaning the mess from the batteries & terminals. I’m pleased even if the fiber-filled felt doesn’t stop the corrosion. I also bought and applied terminal protectant spray, from CRC to terminal connections and terminals. Now that batteries have become so expensive, stopping corrosion is much more of value to me. I hope they actually help.

My vehicle has 2 batteries so this works with a spare. Beyond that it's felt so it soaks up extra battery corrosives and is colored to denote positive and negative terminals.It do what it do.

A great product for a great price.

Great product and value highly recommend it

What can I say? These are felt washers to put under the battery connectors on a vehicle. These serve that purpose. The color coding helps for instant identification when attaching a charger or jumper cables.However, I don't recall not having any of these on an auto battery over the 40 years I have been driving, and I have no idea what would really happen if they were omitted. Probably not much.