10 1/4 inch = 6.35 mm Loose Ceramic Balls G10 ZrO2 Bearing Balls

Appear to be excellent quality and good value.

I could tell the difference just rolling the bicycle across the garage floor.

We uses these balls in some of our high end turbocharger boost adjusters. They perform consistently and survive in race applications.

While cleaning and polishing some silver pieces for Christmas I came across what turned out to be an antique lazy susan whose nineteenth century iron bearings had severely rusted and froze the "round and round" feature. After a thorough cleaning and scouring I replaced them with your ceramic dudes -- which incidentally were expeditiously delivered. My two year old granddaughter will now be able to proudly show off her 5x great grandmother's "round and round" thingy to her great grandchildren.

I need some replacement bearings for my PGP paintball gun. Perfect fit just what I needed!