Crimp Top Seals for Chromatography Vials are available in Polypropylene or Aluminum. Polypropylene seals decap smoothly and easily and holds the septa firmly in place. They permit an airtight seal by hand or use a standard crimping tool. Polypropylene construction means no more sharp edges. Aluminum Seals have a larger opening to provide increased target area for needle penetration.
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