The SJ GJ-G is purpose-built for the filling and stoppering (half- or full-stopper) of injectables and freeze-dried preparations in vials — the exact step that feeds your lyophilizer. A one-head-one-pump servo system meets the high-precision requirements of small-dose filling, while the soft-vacuum stoppering device and progressive top-stopper mechanism sharply raise stoppering success and fully meet GMP.