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Precision instrument grade ruby balls in 18mm diameter with a tolerance deviation of ± 100 μm (17.9mm-18.1mm).
Please consult the photo for the exact ball size.
These are excellent for severe environments. They have a high temperature working range, high strength, high hardness and high chemical stability.
Mohs Hardness Scale: 9
The listing is for individual 18mm synthetic red ruby corundum round beads with no hole.
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.
*The free shipping option ships out in a normal envelope without a tracking number*
