Rubber Stopper Size #21 - Solid
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Rubber test tube stoppers suitable for Erlenmeyer Flasks. These long lasting stoppers are made from excellent grade rubber, with a low sulfur content. Contains 1 Size 21 stopper.
|Material||Chemical Resistant Rubber|
|# of Holes||0|
Not sure what size stopper to use? See our handy Rubber Stopper Size Chart for help