Check Valve Cartridge, Ceramic, 2/pk Back Catalog number: CTS-21463 Availability: In the manufacturer's stock Price on request - + Recommended CTS-A11135 50μL Std. Zirconia Mixer Price on request CTS-10759 Piston Seal Backup Ring Price on request CTS-21287 Needle Kit, 15 µL with Needle Seat and Needle Guid Price on request