The Plastic Filling Bell prevents contamination during sterile filling procedures. Culture Media will be protected while being filtered into the receiving vessel. Our Polycarbonate construction allows for observation during use. The filling Bell easily attaches to Pall AcroPak(TM) Capsules and fits over a variety of collection vessels.- Polycarbonate material- Gum Rubber washer can adapt to fit a range of stem sizes, 1/4 inch to 1/2 inch (6-13 mm)- Presterilized by gamma irradiation.- Individually packaged and ready to use This product is not approved for use in medical, clinical, surgical or other patient applications.