Brand：USA Lab Equipment
It requires no oil what so ever to operate, easy to use vacuum pump. Each vacuum port pulls vacuum separately allowing for either separate applications or connect them together for a stronger vacuum. This aspirator vacuum pump can also be used to re-circulate water through the back ports if needed. These work great for our 10L, 20L and 50L Rotary Evaporators and are an inexpensive yet effective way to pull vacuum!
