... KPa At room temperature tightness: internal air pressure 70 KPa, 72 hours, pressure does not drop. Temperature cycle: room temperature 20 °C ... ~ +60 °C) at the time of not less than four hours, 12 small cycle, the internal air pressure 60 KPa ± 5KPa ... air pressure 70 KPa, at 60 °C to maintain 168 hours, pressure does not drop. Additional attenuation: fiber in the host ...