JIS (Japanese Industrial Standards) to SAE (Society of Automotive Engineers) Shims
If you have a battery with JIS electrical top post (Japanese Industrial Standards - slightly larger than a pencil) and need to convert to American these shims are for you.
The shims that they sell most automotive store are use with damaged SAE post. (Shewed up and are not thick enough.) These are not repair shims and are what you need for JIS to SAE conversions.
One typical example where this is needed is a Toyota Prius where the connectors were converted to American You have already bought the standard Prius battery which has the smaller JIS (pencil size connectors).