Check Valve Cartridge, Ceramic Ball & Seat, 2/pk Back Catalog number: 11-2401 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-10323 Sapphire Plunger Price on request CTS-A11151 Needle Assembly, PEEK™ Price on request CTS-11366 Piston, High Pressure Price on request