1, 95-99.7% Alumina purity tube, 2, Voltage resistance, 16-25V, ... available for gas utensils, gas portable stoves. High purity Alumina TubeFeatures:1, Extreme high temperature stability under reducing, inert ... eliminate contamination or impurity,6, Low material cost and custom size available.Specifications:Range of Outside diameter, 3mm ... 7-10 days after receiving the payment Kejia Alumina Ceramic Tube