A lip seal is lip or ring that is molded into the top of the cap. It fits against the interior wall of the tube or bottle preventing the contents from coming in contact with the seal or threads, thereby reducing the chances of sample contamination. See the link below for Duran pouring rings which are offered separately. There are several GL45 options:
https://www.sigmaaldrich.com/substance/pouringringsforduranlaboratorybottles1234598765
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一般說明
The classic laboratory bottle GL threaded screw cap features the tried and tested cap plug sealing system ensuring a liquid tight seal. Available in four colours; blue, green, yellow and grey with matching pouring rings. Distinguishing media types is simplified and interchanging of screw caps and the risk of cross contamination is greatly reduced.
特點和優勢
- Cap with integral lip seal provides effective sealing for short term storage
- Pouring ring for drip-free pouring
- The colour helps prevent interchanging of cap mix-ups and reduces the risk of cross contamination
- Fully compatible with the GL 45 threads and therefore highly versatile
法律資訊
DURAN is a registered trademark of DWK Life Sciences
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It says caps with lip seal - is this the rings that go around the top of the bottle to make pouring easier? We ordered these caps and they did not come with those
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