Product description Alumina ceramic tubes are widely used in various industrial furnace for supporting, threading and insulation etc.They are recommended for use in mass spectrometers and other vacuum sustems as feed through lines, thermocouple insulators, and in other applications requiring electrical and thermal insulators. Product feature Excellent thermalstability Insulation Temperature resistance Etc.Properties Product specification/models Standard dimension Ceramic tubes can be in single hole, double, three and four holes. The size of the ceramic tube's outer diameter range from 0.8mm-14mm. The ceramic tubes can be supplied in longer lengths(up to 2500 mm long).We can also custom cut shorter lengths to your specifications. The ceramic tubes can be triangular tube, square tube, other types, etc. Application Alumina ceramic tubes are used in b-type, s-type and tungsten-rhenium thermocouple sleeves. Other information In addition, timely delivery, stocks and product information are available. Should you have any questions, pls do not hesitate to contact me. Free samples will be sent for your evaluation! Note:if we have available stocks for your sizes, free samples can be sent to you but you bear the freight. If your sample is custom-made, you should pay for both the sample fee and freight.