... :1-50mm 4.Purity :More than 99.99% polished quartz plates coated quartz platesQuartz glass high temperature resistance, corrosion resistance, pervious to ... window worldhawk main products include clear quartz tube . UU-stop quartz glass tube . far infrared quartz heating tube . opaque quartz tube , low OH quartz tube , quartz rod ,quartz plate ,quartz boat , high purity sand ,etc ...