we are the quartz tube factory. the largest OD we can make is 420mm. For further more ... .6-10mm length:5-3.000mmFurther-processing: Ends closing, sand blasting, polishing, bending, cutting, pinching, burning mouth and so on The special one ... , pls kindly send me the drwaingApplication: Widely used in the filed of semiconductor, metallurgy, chemical ...