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quartz tube OD: 3-380mm WT: 0.5-18mm LG: 10-3000mm clear fused quartz glass tube ,which is produced through the advanced productive technique of continuous smelting method, it has the characteristics of high purity, strong transmission , good thermally stable function, clear surface,low contents of hydroxide radical , it is the first used materials of producing halogen lamp , mercury vapor lamp ,metal halogen lamp, the contests of hydroxide radical metal halogen lamp, the contests of hydroxide radical metal halogen lamp, the contests of hydroxide radical can be controlled within 20PPM\10PPM\5PPM\2PPM according to the demands of customers.