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-0038 Tube, Right Inlet Pigtail Price on request CTS-10548 Gold Plunger Seal, Analytical Heads Price on request CTS-0620 Outlet Check Valve Cartridge Price on request