Needle Guide Back Catalog number: 11-2591 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended 11-2401 Check Valve Cartridge, Ceramic Ball & Seat, 2/pk Price on request CTS-A138 Ceramic Plunger Assembly Price on request 11-3321 Wash Seal Gasket, 6/pk Price on request