The Hoprime quartz fiber twisted yarn is assemblies of continue high purity (SiO2≥99.99%）quartz filament(diameter 7.5um) gathered into strands ( forming package + carton box),then processed with varying levels of twist and ply . Quartz fiber yarn has many superb properties: high purity, high temperature resistance,ablation resistance,low heat-conduction,anti-thermal shocks,excellent dielectrical property and chemical stability.