Features：

1. Double-layer insulation with air-cooled interlayer;

2. High-purity Al2O3 fiber refractory insulation material for maximum energy savings;

3. High-purity alumina coating on the refractory hearth extends service life;

4. High-purity quartz plugs allow you to create a customized temperature gradient within the tube.

5. Comprehensive protection against over-temperature, short-circuiting, and cooling water interruption for worry-free safety!

6. Interchangeable temperature measurement port and observation window (selectable).