Cole-Parmer Micro Aperture Stoppers, Rubber or Neoprene
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Cole-Parmer Micro Aperture Stoppers, Rubber or Neoprene
Use the tapered micro stoppers for openings from 4 to 12.7 mm. Available in soft, natural red rubber, or heat-resistant, green neoprene. Materials feature low sulfur content and low extractables. Cut to size.