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-11091 ACQUITY BSM Performance Maintenance Kit Price on request CTS-21164 Rotor Seal, 6 port, Rear Price on request CTS-10324S Seal Pack w/Needle Price on request