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Cole-Parmer Datasheets for Laboratory Stoppers

Laboratory stoppers are truncated, cylindrical or conical pieces that are used to plug, close and/or seal labware.
Laboratory Stoppers: Learn more

Product Name Notes
• A Certificate of Conformance with regulatory standards is supplied with every shipment Ultra-pure, platinum-cured silicone stoppers are ideal for high-purity applications. They exhibit excellent resistance to most chemicals except...
• Snug fit and easy removal<emdash>will not freeze or bind Durable, chemically inert white PTFE stoppers are ideal for use with flasks, funnels, and cylinders that require flask-length stoppers. Hollow...
• Standard tapered stoppers, manufactured with XXXX-grade cork Economical, non-reactive stoppers are ideal for contact with nonaggressive or low concentration liquids or powders under average laboratory usage.
• Using a fresh, clean bottle for each analysis provides more accurate results in your lab • Ideal for 300 mL BOD bottles
Black rubber stoppers stay pliant over a long period and withstand laboratory conditions without hardening. Stoppers retain resiliency even after repeated autoclaving. Each stopper has its size in raised figures...
Durable and reusable foam stoppers are an economical way to keep the contents of your containers secure. Open-cell foam has a uniform density, leaves no fibers like cotton, is breathable,...
Green neoprene stoppers withstand petroleum products, fats, oils, and organic chemicals. Stoppers exhibit good resiliency and shelf-life. Each stopper has its size in raised figures on top. Contain no sulfur.<b>Autoclavab...
PTFE stoppers have a polypropylene turning nut to eliminate frozen neck joints. Use up to 410<deg>F (210<deg>C).
Rubber Stopper
Silicone bubbles make these stoppers lightweight—they float on water. Withstand temperatures from –76 to 392<deg>F (–60 to 200<deg>C). Stoppers are available in 14 color-coded sizes, given in both standard and...
Sizes Standard Taper 10/30 through 19/22 are solid. Sizes Standard Taper 24/40 and larger are hollow.
Stopper for butyrometer 17425-10. Order stopper pusher 17425-16. Box of 100.
Stoppers
Straight plug style stoppers provide maximum sealing for vials with straight wall glass finish. The straight wall interior finish is typically found in vials from European manufacturers. This style is...
These two-hole black stoppers made with solid natural rubber stay pliable over a long period of time. Provide good tightness and adhesion, withstand laboratory conditions without hardening, and are ideal...
Translucent silicone stoppers are especially suited for procedures demanding high purity, such as tissue culture work and food science applications. Food-grade quality stoppers are nontoxic, chemically inert, and resist particle...
Two-part folding skirt stoppers are designed to keep your contents secure two ways. The lower section is molded to grip the outside of the container and the upper hollow plug...
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.
Use these versatile Twistit stoppers as either a solid, one-hole, two-hole, or three-hole stopper. Simply twist off a bottom seal to open a hole. The soft resilient natural rubber stays...
Use with sample tubes 08710-50.