Conical quartz flask quartz glass flask/quartz flask/conical quartz flask: 

Product Description: 
1.Extraordinary Reliability - 
Thermo Materials' ISO 9000 quality system mandates 100% inspection using assisted visual, ultrasonic and other quality assurance techniques for crucibles 

2.Outstanding Thermal Shock Resistance 
It maintains the lowest coefficient of thermal expansion of any commercially available material 

3.Excellent Refractoriness 
They are reliable performance to extreme temperatures and pressures.