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 11-2525 1/4" Short Comp. Screw (Gold-Plated), 10/pk Price on request CTS-20612 Plunger Seal, Black Price on request CTS-11335 ACQUITY H-Class QSM Performance Maintenance Kit Price on request