Excellent bearings! We used them to fix a rare (in the US at least) JDM alternator that unexpectedly stalled and disabled my '92 son's daily cappuccino driver. A big problem. It would cost several hundred dollars in parts + shipping, not to mention possibly shipping from Japan in a couple of weeks. Restoring it was a daunting task, but these little bearings saved the day! Three months later, the generator is still as quiet as new. I highly recommend them. The price/performance ratio is unsurpassed! thickness just right! It really helped us! Buy with confidence!