We have produced OD3-100 transparent quartz tube that has characteristic of high purity, good transition and no airline. )OD 3-400mm 2)Thickness Wall: 0.7-10mm 3)Length: Max3000mm 4)Exported to USA for 5 years 5)Our Own Factory Transparent Quartz Glass Tubes For Heater UsingProduct Features:These tubes advantages are high purity, good spectral transmission, well controlled dimension and low OH, ...