Check Valve Cartridge, Ceramic Ball & Seat, 2/pk Back Catalog number: 11-2401 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-A11135 50μL Std. Zirconia Mixer Price on request CTS-10476 Sapphire Plunger, Alliance Price on request CTS-21171 Rotor Seal, H-Assy, 6 Port 2-Position Price on request