Stoppers

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  • Premium Stoppers, Straight Plug with Coating

    DWK Life Sciences (Wheaton)

    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…

  • 3-Leg Lyophilization Stoppers

    DWK Life Sciences (Wheaton)

    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…

  • Snap-On Stoppers

    DWK Life Sciences (Wheaton)

    Natural red rubber or gray chlorobutyl/45 material 7 x 13 or 13 x 20 mm sizes

  • Ultra Pure Stoppers

    DWK Life Sciences (Wheaton)

    Bromobutyl rubber compound with a high level of chemical purity Straight Plugs and Lyophilization Stoppers (2-leg, 3-Leg and Igloo) are available All Ultra Pure Stoppers are autoclavable Ultra Pure Straight Plug Stoppers are made from a bromobutyl rubber compound containing the…

  • Ultra Pure Lyophilization Stoppers are made from a bromobutyl rubber compound containing the highest level of chemical purity. These stoppers demonstrate a very low level of moisture absorption and are ideal for most lyophilization applications. They are compatible with Water for Injection (WFI)…

  • Ultra Pure Stoppers, 20 mm

    DWK Life Sciences (Wheaton)

    Bromobutyl rubber compound with a high level of chemical purity Straight Plugs and Lyophilization Stoppers (2-leg, 3-Leg and Igloo) are available All Ultra Pure Stoppers are autoclavable

  • Stopper Top Pk144

    DWK Life Sciences (Kimble)

    Top Stoppers for Incubation Flasks. Rubber stoppers for flask top and sidearm provide a secure double seal Top stopper has off-center hole for insertion of center well Fits both 10 and 25 mL flasks

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