when the temperature is below -185 degrees Celsius. PTFE gasket will be crisp. Pure PTFE gasket seal is a clean product, will no

      Note: when the temperature is below -185 degrees Celsius. PTFE gasket will be crisp. Pure PTFE gasket seal is a clean product, will not come into contact with the formation of any contaminated material can be widely used in food, medicine and other industries...