1.5-160mm diameter scope, the scope 0.5-15mm thickness, length 10-3000mm. General transparent quartz tube SiO2 was 99.9% above geometry, chemical stability, thermal stability, thermal denaturation and anti-crystallization excellent performance, optical transmittance of 93% or more; delinking of hydroxyl in hydroxyl below 10 ppm, After vacuum from hydroxyl, hydroxyl up to 5ppm below apply to the high-pressure mercury lamp, sodium lamp, metal halide lamp, and other low-products;Creamy white pipe, used mainly for heating control, heating control, far infrared control the manufacture,.