1, 95-99.7% Alumina purity, 2, Voltage resistance, 16-25V, 3, available for gas utensils, gas portable stoves. High purity Alumina TubeFeatures:1, ... Extreme high temperature stability under reducing, inert and high vacuum condition under high temp. up to 1800C ... sea, in 7-10 days after receiving the payment Kejia High purity Alumina Tube