Needle Seat Back Catalog number: 11-2570 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended 11-4134 Rotor Seal & Pod Repair Kit, Vespel, 3-Groove for Price on request CTS-21183 Peristaltic Pump Price on request 11-1600 Check Valve, Secondary Inlet Price on request