Plunger Seal Back Catalog number: CTS-10693 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-21463 Check Valve Cartridge, Ceramic, 2/pk Price on request CTS-A096 Syringe Assembly, 250μL Price on request CTS-21262 Needle, Uncoated 20 Series Price on request