采用日本進口九九氧化鋁陶瓷，具有高耐磨性能，內外徑配合公差≤1μm本產品設計的結構獨特，在長年使用過程中杜絕了陶瓷開裂、斷裂現象。

主要性能指標：
材料 99.7氧化鋁(α-AL2O3)
硬度 1750HV
燒成溫度 1750℃
密度 3.92g/cm3
表面粗糙度 ≤0.1μm

This product, 99% of which alumina ceramics being made of materials imported from Japan, features high wear resistance, with fit tolerance between internal diameter and external diameter being ≤1μm.
With uniquely designed structure, the ceramic is absolutely free of cracking and rupture during its long-year use.

Main speeification requirements:
MATERIAL 99.7 aluminum oxide (α-AL2O3)
VICKERS HARDNESS 1700HV
FIRING TEMPERATURE 1700℃
DENSITY 3.92g/cm3
SURFACE ROUGHNESS ≤0.1μm