Description:
-Zirconium Oxide ZrO2 (also known as zirconia) is a material with very low thermal conductivity, high strength and very high resistance to crack propagation.
-Used in applications such as precision bearings, pumps and valves, check valves, flow meters, and measurement instruments that operate in aggressive environments.
-Specially useful for casters, drawer slides, door locks and many other applications.

Suitable for a range of purposes, some of the most common are listed below:
-1/8" is often used for clusters and old English-style headsets
-1/4" is often used for rear wheels and bottom brackets
-3/16" is often used for front wheels
-5/32" is often used for headsets with pressing cups

Specification:
Size: 2.5mm
Precision: G5
Material: Zirconium Oxide (ZrO2)
Package Content: 25 Piece