Precision Seal® rubber septa cap

white, for 3 mm O.D. tubes and ampules, pack of 10 ea

rubber caps, rubber stoppers, rubber stopper


natural rubber septa


for 3 mm O.D. tubes and ampules


pack of 10 ea
case of 100 ea



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General description

Engineered for a "push on" fit in NMR tubes and ampules. The unique design provides a penetration point for cannulation and a dual seal inside the tube and on the outer sleeve. Will not break delicate, thin-wall tubing. Manufactured from one certified raw material formulation for absolute consistency in all sizes, from lot to lot.

Storage Note for Natural Rubber Septa: Store septa in a closed bag out of sunlight to retard blooming, which is the formation of a whitish film on the surface of the rubber. Blooming is a natural process and does not affect performance. Remove visible bloom by washing or wiping off before use.

Legal Information

Precision Seal is a registered trademark of Sigma-Aldrich Co. LLC

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Certificate of Origin

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