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-2294-04 Plunger Seals, 4/pk Price on request CTS-10758 Pump Seals, High Pressure Price on request CTS-A11187 Outlet Check Valve Price on request