two holes alumina ceramic tube,porous ceramic tube,high alumina ceramic tubes with holes,99% alumina ceramic tube 

Features:

1.Have the features of good insulation and air tightness , resistant to high temperature ,voltage and pressures ,

2.Extreme high temperature stability under reducing, inert and high vacuum condition under high temperature up to 1800C,extreme wear and abrasion resistance.

3.Chemical corrosion resistance under high temperature, high dielectric properties.