alumina ceramic tube 1, 95-99.7% Alumina ... Model: High purity Alumina TubeFeatures:1, Extreme high temperature stability under reducing, inert and high vacuum condition ... abrasion resistance,3, Chemical corrosion resistance under high temperature,4, High dielectric properties,5, Gas tight ... provide protective atmospheres or high vacuum at high temperature to eliminate contamination or impurity,6, Low ...