1>.Small size 2>.Double-meter ,double-tap 3>.Anti-corrosion 4>.no-pollution 5>.Big power VACUUM PUMP seriese were researched successfully by us ,respective for small size double-meter double taps and big power vacuum pump ,main machine is made of stainless material,Non-Vacuum pump, water circulation, provides vacuum for 5L rotary evaporator and glass reactor.Features:1>.Small size ,rich ...