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-11434 Sapphire Plunger Price on request CTS-10548 Gold Plunger Seal, Analytical Heads Price on request CTS-21011 Cartridge Check Valve System Kit Price on request