Black quartz glass tube is a new type of quartz glass material, with high temperature resistance and excellent thermal shock properties. The product could stop nearly all UV and a part of visible light. It is widely used in the field of far infrared heating, such as heater, electric cooker, surface drying. Its main component is SiO2. Transmittance> = 80% @ 0.8-3um wavelength.Other Specification: customized.