Thermal protection in the form of a sleeve. Strong, chemically resistant (except for hydrofluoric acid, phosphoric acid, and strong bases). Completely flame resistant. High content of pure silica (over 96%) ensures excellent temperature resistance, flexibility, and minimal shrinkage. It has electroinsulating properties. Does not emit smoke or fumes. Wall thickness is approximately 1.65 mm. Material: silica fiber (silicon dioxide). Operating temperature: up to +982°C (temporarily up to +1650°C).