Stoppers

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  • Image of Glass Pennyhead Stopper, Standard Taper 24/40

    Glass Pennyhead Stopper, Standard Taper 24/40

    Item #: 8764J51
    Hollow plug type With sealed bottom and vertical penny head
  • Image of KIMAX Brand Joint Stoppers

    KIMAX Brand Joint Stoppers

    Borosilicate, with penny head Conforms to ASTM Standard E 675 Size Standard Taper 13 has solid plug; size Standard Taper 38 has recessed bottom Standard Taper designation indicates the approximate diameter of the ground zone at its widest (gauging) point.
  • Image of 3-Leg Lyophilization Stoppers

    3-Leg Lyophilization Stoppers

    1233Z70: 3-leg design provides stability during lyophilization and resists cocking. Constructed of Gray Chlorobutyl/50 material and fit bottles with mouth 13 mm ID x 20 mm OD. 1224A82: 3-leg lyophilization stopper is made from gray chlorobutyl/55 and is used with Wheaton screw neck diagnostic...
  • Placeholder Image for 11 mm Stopper, Sleeve (5X11) Red Rub

    11 mm Stopper, Sleeve (5X11) Red Rub

    Item #: 1780K02
    Sleeve stoppers are plug stoppers with fold-over skirts Used on serum vials and other crimp-finish containers that do not require aluminum seals or overcaps Can be used as an injection site for multiple dose entry Manufactured from natural red rubber, a general-purpose rubber formulation that has...
  • Image of 13 mm Stopper, St Plug, Polymer Coating

    13 mm Stopper, St Plug, Polymer Coating

    Item #: 1228L28
    Completely coated with a fluorinated polymer that has barrier properties similar to PTFE; only material that comes in contact with the sample. Chemical reactions due to unwanted interference with the rubber itself are virtually eliminated. Manufactured in a silicone-free environment. Specialized...
  • Image of 20 mm Stopper, St Plug, Polymer Coating

    20 mm Stopper, St Plug, Polymer Coating

    Item #: 1228L33
    Completely coated with a fluorinated polymer that has barrier properties similar to PTFE; only material that comes in contact with the sample. Chemical reactions due to unwanted interference with the rubber itself are virtually eliminated. Manufactured in a silicone-free environment. Specialized...
  • Image of Multifit Reusable Glass Syringes, Luer-Lok™

    Multifit Reusable Glass Syringes, Luer-Lok™

    Interchangeable plungers Luer-Lok™ tip Without needle Multifit interchangeability eliminates matching components after sterilization. Fine inference line on plunger for precise volume adjustments. Capacity and graduation interval are shown in listings. Zone 2 coded.
  • Image of Neoprene Rubber Stoppers

    Neoprene Rubber Stoppers

    Solid green Neoprene Withstands exposure to temperatures up to  120°C Usable with petroleum products, vegetable and mineral oils and fats which deteriorate natural rubber Standard length: 26 mm Increased functionality over rubber stoppers at elevated temperatures. Not recommended for use with...
  • Image of One-Hole Rubber Stoppers

    One-Hole Rubber Stoppers

    Size No. 000, 00 and 0 have hole 3 mm diameter; sizes No. 1 and 2 have hole 4 mm in diameter; all other sizes have hole 5 mm in diameter.
  • Image of Premium Stoppers, Straight Plug with Coating

    Premium Stoppers, Straight Plug with Coating

    Complete Coat Stoppers are completely coated with a fluorinated polymer that has barrier properties similar to PTFE. The fluorinated polymer coating is the only material that comes in contact with the sample. As a result, chemical reactions due to unwanted interference with the rubber itself are...
  • Image of PYREX Brand Joint Stoppers

    PYREX Brand Joint Stoppers

    Solid with penny head
  • Image of Rubber Sleeve, Plug Type Stoppers

    Rubber Sleeve, Plug Type Stoppers

    Hollow, plug-type stopper fits into the neck of the apparatus. Sleeve extension fits over the neck for a secure seal. Diaphragm can be punctured with a syringe needle. Applications include outgassing NMR sample tubes, use as a pressure vent or for adding reactant via a syringe.
  • Image of Scienceware® Safe-Lab® Teflon® Stoppers

    Scienceware® Safe-Lab® Teflon® Stoppers

    Of solid Teflon® with threaded top on which polypropylene nut is mounted Easily cleaned Conforms to ASTM Standard E 675 Will not freeze; withstands temperatures to  210°C Interchangeable with penny head stoppers Nut is rotated to apply coaxial force for easy removal of stopper from...
  • Image of Scienceware® Safe-Lab® Teflon® Stoppers

    Scienceware® Safe-Lab® Teflon® Stoppers

    Similar to 8771R10 series, but in standard taper joint sizes Conforms to ASTM Standard E 675 Use with boiling and distilling flasks
  • Image of Snap-On Stoppers

    Snap-On Stoppers

    Natural red rubber or gray chlorobutyl/45 material 7 x 13 or 13 x 20 mm sizes
  • Image of Solid Amber Silicone Stoppers

    Solid Amber Silicone Stoppers

    Free from volatiles or extractable substances which may impair cell growth; for use at temperatures from -80 to 450°F Can be steam sterilized at 15 lbs. pressure, making them suitable for culture tubes containing pathogenic materials Length: 25 mm Not recommended for use with concentrated...
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