Features: * GG17 high borosilicate glass, with good chemical and physical properties. * The evaporation and back-flow of reaction material can be controlled. * The heat of reaction could be taken away quickly through water, cycling in the jacketed glass. * The design of large bottle mouth, easier to clean. * It can be used as a distillation syntheses device. * The sealing performance is 0.098 Mpa. * LCD display, easier and more convenient to measure temperature.