Precision instrument grade ruby balls in 1mm, 2mm, 3mm, 4mm, 5mm 6mm, 7mm, 8mm, 9mm, 10mm diameter with a tolerance deviation of ± 30 μm.

The 12mm and 16mm balls have a diameter tolerance deviation of ± 100 μm (they are pictured with a nickel).

(1mm: .97mm-1.03mm) (2mm: 1.97mm-2.03mm) (3mm: 2.97mm-3.03mm) (4mm: 3.97mm-4.03mm) (5mm: 4.97mm-5.03mm) (6mm: 5.97mm-6.03mm) (7mm: 6.97mm-7.03mm) (8mm: 7.97mm-8.03mm) (9mm: 8.97mm-9.03mm) (10mm: 9.97mm-10.03mm) (12mm: 11.9mm-12.1mm) (16mm: 15.9mm-16.1mm)

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* synthetic red ruby corundum round beads with no hole.

To see the actual sizes of the balls please consult the photos to see the balls in order from smallest to largest with a nickel in the picture for scale.

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

Many people are using these with concentrates, vaporizers, bangers, dabs, dab rigs and dabbing. Please note, most people who are using these for this purpose are purchasing size 5MM and up!

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.

*Please note that all of the balls are the same material and only differ in size*
*The free shipping option ships out in a normal envelope without a tracking number*