Professional laboratory distillation apparatus, Glassware components are all made of 3.3 Borosilicate Glass,Graham condenser,its inner core tube is spiral shape. adding the length of glass tube,the other part is same as the Allihn condenser.As it can store more distillate,often used as long time distillation and reflx apparetus. Good chemical stability, electrical insulation performance and mechanical properties. With magnetic stirring function, intelligent digital display.If you have any questions before and after your purchase, please feel free to contact us. electric essential oil,rose essential oil,essential oil packaging bottles,essential oil sticks,diffuser necklaces for essential oils,essential oils for breathing.syi