• This rubber stopper is available as a solid, or with one hole.

    Top: 1.0" (25mm)
    Bottom: 3/4" (20mm)
    Length: 1" (25mm)
    Hole Diam.: 5mm
    Fits 24/40 ground glass openings.
Available Discounts
Rubber Stopper Discount
  • Purchase at least 12 and save 10%

Rubber Stopper, Size #4

  • NC-0959
Price: $0.80
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  • All of our black rubber stoppers are laboratory grade.
  • They contain a high percentage of pure rubber and are resistant to chemical attack.
  • Stopper composition ensures resiliency and pliability over a long period.
  • Withstands laboratory conditions without hardening.
  • The upper working temperature is 212°F.

See our Rubber Stopper Size Chart for top, bottom and length specs of our other stoppers.