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-A11381 Needle, SS, 30μL Price on request CTS-A094 Check Valve Cartridge, 2/pk Price on request CTS-10532 Seal Wash Face Seal Price on request