PP Screw Cap with Septa for WATERS
https://www.hplcvials.com/products/1-4ml-hplc-uplc-gc/8-425.html

PP Screw Cap with Septa for WATERS

The screw cap produced by Aijiren is engraved with knurling on the side for excellent grip and comfort when applying it to a vial. The silicone rubber/PTFE septa used in the lining can provide an appropriate amount of resistance for the auto-injection needle during the sampling process, so that they can penetrate the sample bottle correctly without damaging the septum or the injection needle.

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