... Quartz TubingAdvantage: cost price controlled well, high precision, good quality.Product:quartz sleeve, opaque quartz tube,milky quartz/ large milky quartz tube,opaque quartz tube,milky quartz/ quartz heating tubes,milky quartz ... used: halogen lamps, mercury lamps, single-ended lamp, automobile lamp, stage lamp, thermocouple, copiers lights, water treatment lamp casing, all kinds of quartz vessels, ...