Felt rings impregnated with a special, long-lasting chemical that helps prevent the formation of battery corrosion on the terminals and cables. nnKey Features:nStops corrosion from forming at posts.nnSide mount available.nnColor-coded .nAvailable Kit(s) :n#02871 Battery Service Kit (2 pk)  |#02991 Battery Service Side-post (2 pk)nAdditional Information :    0130.pdfProduct Performance Sheet   |   357Safety Data Sheet