What are the advantages of quartz glass? 1.High purity made of 99.99%-99.9999% pure quartz. 2.Strong Hardness, Can reach Morse level 7. 3.High temperature resistance, can work under 1200掳C continuously, and in short time can even work under 1500掳C. 4.Acid and Alkali resistance Except hydrofluoric acid, quartz glass does not react with any acid and base except hydrofluoric acid.The stability is 30 times of the ceramic, and 150 times of stainless steel 5.High light transmittance , it is different from 85%-95% depend on different spectrum. 6.Excellent thermal shock stability ,Small thermal expansion coefficient,it is only 5.5脳10-7/鈩?/p> 7.control in less than 20 PPM, 15 PPM, 10 PPM, 5 PPM ,2 PPM. About us Packing&Shipping FAQQuartz Product price website:http://www.tzjqdr.com/quartz-product/