Needle Guide Back Catalog number: 11-2591 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-10772 Pump Seals, Low Pressure Price on request CTS-10686 Needle Seal, Vespel® Price on request CTS-A11095-02 UPLC Check Valve, Double Ball & Seat, 2/pk Price on request