Check Valve Cartridge, 2/pk Back Catalog number: CTS-10493 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-10391 Plunger Wash Seal Price on request 11-3897 Plunger Holder Price on request 11-2642 Needle Port Seal, AS-100, ASI-100T Price on request