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 11-2591 Needle Guide Price on request CTS-21287 Needle Kit, 15 µL with Needle Seat and Needle Guid Price on request 11-4181 Seal Wash (0.0787 ID, Fixed), 2/pk Price on request