For flasks, round bottom. Flexible glass yarn heating element in outer jacket made of glass silk. With Ø 60 mm bottom out-let from 500 ml. Max. heating element temperature 450 °C. 1.5 m power supply (earthed) cable with heating-zone switch and residual-current circuit-breaker. Mains supply: 230 V AC. For flasks, round bottom. Flexible glass yarn heating element in outer jacket made of glass silk. With Ø 60 mm bottom out-let from 500 ml. Max. heating element temperature 450 °C. 1.5 m power supply (earthed) cable with heating-zone switch and residual-current circuit-breaker. Mains supply: 230 V AC.