Needle Seal (For pH 1-14, for operation up to 130 Back Catalog number: CTS-21089 Availability: In the manufacturer's stock Price on request - + Recommended CTS-10285 TFE 3-Way Valve 4 (V4) Price on request CTS-21011 Cartridge Check Valve System Kit Price on request CTS-21045 SUS Tubing A Price on request