... and drawings 1,, product structure:Fused silica nozzle made of high quality SiO2, as the main material, through ball milling mixing ... steel the ideal protective casting steel materials. 2, product specifications:Quartz nozzle by casting, according to the manufacturer 's production ... densitygcm1.88SiO2%99Compressive strengthcmqc40.30Thermal stability1100cWater cooling time 10 fused Quartz nozzle