Check Valve Cartridge, Ceramic, 2/pk Back Catalog number: CTS-21463 Availability: In the manufacturer's stock Price on request - + Recommended CTS-21012 Compression Screws & Ferrules, 1/16", SS, 5/pk Price on request PS7075350 MarvelXACT™ PEEKsil™ 75µm ID x 350mm Price on request CTS-21089 Needle Seal (For pH 1-14, for operation up to 130 Price on request