... temperature Low OHThe charactor of clear quartz tube:1. high purity,transparent fused quartz glass,silica more than 99.9% ... industry, semiconductor,optical and chemical industriesphysical properties quartz tube:density 20kg.m-3(x103)2.2coefficient ... for all kinds of quartz products. Including quartz tube,quartz rod, quartz plate, quartz crucible, quartz boat, and other quartz products for solar and ...