O-Ring, PTFE Back Catalog number: CTS-00230-02 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-10693 Plunger Seal Price on request 11-3795 Sapphire Plunger w/Holder Price on request CTS-11315 Needle Seal, PEEK™ SIL-20 Price on request