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-21422 Needle Seal Kit Price on request CTS-21463 Check Valve Cartridge, Ceramic, 2/pk Price on request CTS-10788-5 Needle Wash Frit, 5/pk Price on request