Precision instrument grade ruby balls in 3mm diameter with a tolerance deviation of ± 30 μm (2.97mm-3.03mm).

Please consult the photos for the exact ball size. Pictured are balls sized from 1mm-10mm in order from left to right in 1mm increments. The 3mm ball is the third ball in on the left.

These are excellent for severe environments. They have a high temperature working range, high strength, high hardness and high chemical stability.

These will work exceptionally well for scientific, recreational and artistic purposes.

We have the capability to produce a wide range of balls in various sizes and materials. 

Please contact us directly for custom orders and quantities.