Check Valve Cartridge, Ceramic Ball & Seat, 2/pk Back Catalog number: 11-2401 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended 11-1603 Seal, Wash Price on request CTS-5559 Priming Syringe Needle Price on request CTS-3209 Syringe Seal, 250μL/2500μL Price on request