clear quartz glass pipe: 1.SiO2 is more than 99.95% 2.Bulk production to ensure timely delivery 3.Competitive price clear quartz glass sleeve:1.Certification: RoSH approved, IQnet certificate, ISO 14001, ISO 9001,etc.2.Specification: OD ranges from 2.2-300mm, different specifications are available upon request.3.Production capacity: more than 18lines to ensure timely delivery4. Price: good ...