Battery Corrosion Terminal Protectors Color Gray Connection Type Bolt Housing Material Felt Features Eliminates Battery Corrosion for Increased Cranking Ability Oil-Based Formula that does Not Dry or Evaporate Stops Battery Corrosion for the Life of Battery Attachment Type Side Top Compatible Product Type Battery Includes (50) Terminal Protectors Material Felt Overall Depth 3 15/16 in Overall Height 3 7/8 in Polarity Neutral Width 3 11/16 in