Needle Kit, 15 µL with Needle Seat and Needle Guid Back Catalog number: CTS-21287 Availability: In the manufacturer's stock Price on request - + Recommended CTS-10566 Alliance Head Plunger Seal Kit, 2/pk Price on request CTS-A11094-02 UPLC Primary Check Valve Assy, 2/pk Price on request CTS-A11095 Check Valve, Double Ball & Seat Price on request