915 Generation Silicon Nitride R188 KK Bearing Speed Responsive High Carbon Chromium Steel Bearings R188 U Groove for Yoyos Models

The biggest advantage of ceramic ball KK bearings is:Ceramic ball belongs to the insulator, will not make KK bearings produce magnetism, prevent static electricity, do not adsorb dust.
the trouble of demagnetizing KK bearings!

Colour:silver
Material:Silicon nitride
Size: 12.70 x 6.35 x 4.762mm

Package Contents:
1 x Silicon Nitride R188 KK Bearing

Only the above package content, other products are not included.
Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.