Cartridge, BioAcquity, I2V Back Catalog number: CTS-21192 Availability: In the manufacturer's stock Price on request - + Recommended CTS-10711 Alliance Head Plunger Seal Kit, Black, 2/pk Price on request CTS-A125 Inlet Check Valve Assembly Price on request CTS-21089 Needle Seal (For pH 1-14, for operation up to 130 Price on request