Check Valve Cartridge, Ceramic Ball & Seat, 2/pk Back Catalog number: 11-2401 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended 11-4116 Sample Needle Kit, 15µL Price on request CTS-21586 1100 Series Essential Pack, G1310A/G1311A Pump Price on request CTS-10476 Sapphire Plunger, Alliance Price on request