opaque quartz tube

Opaque quartz tube 1.SiO2 more than 99.5% 2.pectral transmission at 500nm: less than 10% 3.widely used in heater,microwave oven,electrical baking oven,sterilization container and so on 4.size:74mm OD,3.1mm WT,740mm length 5.physical properties: opalescence SiO2 Thermo-stability Spectral transmission at less than 500nm SiO2 more than 99.5% Keep under 900°C for 15 minutes,then put into 20°C water 3 times,no crack 6.dimensional tolerance Range of OD OD WT siding Out of round Bow/1220mm 8.00-15.00 ±2.0% ±10% 15% 1.5% 2.5mm 15.00-20.00 ±1.5% ±10% 15% 1.5% 2.5mm 20.00-25.00 ±1.5% ±10% 15% 1.5% 2.5mm