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-A138 Ceramic Plunger Assembly Price on request CTS-11425 Sapphire Plunger Price on request CTS-21463 Check Valve Cartridge, Ceramic, 2/pk Price on request