Ceramic balls provided by SunYoung Industry have the following features:
1) Material: Silicon Nitride (Si3N4), Zirconia (ZrO2), Aluminum Oxide (Al2O3)
2) Usage: for bearings, inspection, pumps, and other rolling conditions
3) Capacity: 3,000,000pcs/month for 5/32" silicon nitride balls
4) Diameter: 1/64" ~ 2"
5) Precision: G3 ~ G20

Specifications (compare to steel):
1) Lighter than steel
2) Larger elastic modulus
3) Lower friction coefficient, rolls more freely
4) Lower coefficient of thermal expansion
5) Superior surface finish
6) Higher high-temperature hardness
7) Never rust, and can roll without oil or grease
8) Better corrosion resistant than steel