Check Valve Cartridge, 2/pk Back Catalog number: CTS-10493 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-11315 Needle Seal, PEEK™ SIL-20 Price on request CTS-A11151 Needle Assembly, PEEK™ Price on request CTS-A117 Inlet Check Valve Price on request