•  This is a brand new 1,000 piece lot of Shiny GREEN  20mm flip top seals for use with 20mm serum vials in combination with 20mm stoppers (sold separately).  
  •  Providing airtight seals when used in conjunction with 20mm rubber stoppers (sold separately).  
  •  Plastic top flips off to reveal aluminum seal with hole.   These will come in a clear zip lock Bag. Buy with confidence, check our feedback.                                                                                                                                                                                             
  • Gray butyl rubber stoppers (straight plug style) used to seal 20mm serum vials in combination with 20 mm flip top, flip off, and standard aluminum seals. Provides an airtight seal. "20mm Gray Butyl Stoppers

  • Silicone Vial Stopper, 20mm, Clear – Lab & Pharmaceutical Grade

    High-quality solid silicone vial stoppers designed for laboratory, pharmaceutical, and research applications. Silicone construction provides superior resistance to moisture, chemicals, acids, and temperature extremes compared to traditional butyl rubber stoppers. Transparent material offers a clean, sterile appearance for controlled environments.

    Features:

    • Size: 20mm

    • Material: Solid silicone (clear)

    • High resistance to humidity and moisture contamination

    • Enhanced chemical, acid, and temperature stability vs. butyl rubber

    • Suitable for serum vials, molded vials, and laboratory bottles

    • Clean, transparent, sterile appearance for lab use