Stoppers

For use with manifolds having #15 O-Ring joints. Supplied complete with one #116 (CS-R116) Viton O-ring.

Used for flasks, mixing cylinders and separatory funnels. Manufactured from Borosilicate 3.3 glass to meet ASTM E438 standards, Class A requirements.

They are used with flasks, mixing cylinders, and different laboratory glassware. Available in different joint sizes and made from borosilicate glass.

For apparatus having an inner opening.

Hollow stopper for use with spherical socket joint.

PTFE handle stoppers for easy gripping.

Solid handle stopper, flask length with standard taper. Easy-to grip handles are color-coded to make identification and sorting are also quick and eas...

Flange-type stoppers with a hollow plug and sleeve extension that folds down over the neck of a vessel, tubing, etc. The diaphragm can be punctured wi...

Stopper with handles for easy gripping. The enlarged flange is designed to protect the neck if the glass object is tripped over 

Lightweight and very strong to resist chipping and breakage. Its Barrel-shaped head for easy cleaning and rotation in and out. It has a flat top which...

Flask length solid penny head stopper with actinic red stain. Used for volumetric flask 

Cork has been used as the stopper of choice for many industries and for many, many years. There are endless types and sizes of closures and stoppers a...

Solid neoprene. Shows resistivity to petroleum products, fats, oils, and organic chemicals. It is highly recommended to use where there is a risk for ...

Use rubber stoppers and lab-grade corks to contain liquids in test tubes and flasks keep your chemistry experiments clean and safe with rubber stopper...

Low-cost polyethylene stoppers are an alternative to standard glass and PTFE stoppers Leak-proof, air-tight seals  Wide top flange for ease of use