Performance Autosampler Needle Back Catalog number: CTS-7550 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-21085 Rotor Seal, 6 port, -COH Price on request 11-4052 Needle Seal, SIL-30AC, SIL-30ACMP Price on request 11-4126 Plunger Seal and Back Up Ring Price on request