Check Valve Cartridge, Ceramic, 2/pk Back Catalog number: CTS-21463 Availability: In the manufacturer's stock Price on request - + Recommended CTS-21095 Seal Wash (0.0787 ID, Fixed, Bio), 2/pk Price on request CTS-21089 Needle Seal (For pH 1-14, for operation up to 130 Price on request PS7075150 MarvelXACT™ PEEKsil™ 75µm ID x 150mm Price on request