... ;7. The system's sealing is very good, high vacuum, high evaporation rate, high return rate;8. The glass instrument adopting GG-3 ... ensure that the electrical properties. Also, we have 2L, 3L, 5L, 10L, 20L, 30L, 50L Rotary Evaporator models for choice.If ... cooperation. Once cooperation, forever friendship. Welcom to contact with Taikang High quality laboratory instrument RE-2000A Rotary Evaporator