Needle Seat Back Catalog number: 11-2570 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended 11-4122 PTFE Diaphragm, LC-30AD/i-Series, 2/pk Price on request CTS-11371 ACQUITY I2V BSM Performance Maintenance Kit Price on request CTS-1010T O-Ring, TFE Price on request