Needle Guide Back Catalog number: 11-2591 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-A138 Ceramic Plunger Assembly Price on request CTS-10493 Check Valve Cartridge, 2/pk Price on request 11-4122 PTFE Diaphragm, LC-30AD/i-Series, 2/pk Price on request