1. The product consists of a stopper piercer protective cover, a stopper piercer, an injection part, a graduated burette, a shut-off valve, a dropper, a chemical liquid filter (the nominal pore size of the filter membrane is 20±1μm), an air filter, a pipeline, flow regulator, external conical joint ...

1. The product consists of a stopper piercer protective cover, a stopper piercer, an injection part, a graduated burette, a shut-off valve, a dropper, a chemical liquid filter (the nominal pore size of the filter membrane is 20±1μm), an air filter, a pipeline, flow regulator, external conical joint ...